<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva-->
<!-- -->
<link:linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <link:roleRef roleURI="http://www.rubiconproject.com/role/AccountsPayableAndAccruedExpenses" xlink:href="rubi-20191231.xsd#AccountsPayableAndAccruedExpenses" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/AccountsPayableAndAccruedExpensesDetails" xlink:href="rubi-20191231.xsd#AccountsPayableAndAccruedExpensesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/AccountsPayableAndAccruedExpensesTables" xlink:href="rubi-20191231.xsd#AccountsPayableAndAccruedExpensesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/AccumulatedOtherComprehensiveLoss" xlink:href="rubi-20191231.xsd#AccumulatedOtherComprehensiveLoss" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/AccumulatedOtherComprehensiveLossScheduleOfComponentsOfAccumulatedOtherComprehensiveLossDetails" xlink:href="rubi-20191231.xsd#AccumulatedOtherComprehensiveLossScheduleOfComponentsOfAccumulatedOtherComprehensiveLossDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/AccumulatedOtherComprehensiveLossTables" xlink:href="rubi-20191231.xsd#AccumulatedOtherComprehensiveLossTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/BusinessCombinations" xlink:href="rubi-20191231.xsd#BusinessCombinations" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/BusinessCombinationsAcquiredIntangibleAssetsAndEstimatedUsefulLivesDetails" xlink:href="rubi-20191231.xsd#BusinessCombinationsAcquiredIntangibleAssetsAndEstimatedUsefulLivesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/BusinessCombinationsAllocationOfTotalPurchaseConsiderationsDetails" xlink:href="rubi-20191231.xsd#BusinessCombinationsAllocationOfTotalPurchaseConsiderationsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/BusinessCombinationsNarrativeDetails" xlink:href="rubi-20191231.xsd#BusinessCombinationsNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/BusinessCombinationsTables" xlink:href="rubi-20191231.xsd#BusinessCombinationsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/CommitmentsAndContingencies" xlink:href="rubi-20191231.xsd#CommitmentsAndContingencies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/CommitmentsAndContingenciesDetails" xlink:href="rubi-20191231.xsd#CommitmentsAndContingenciesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/ConsolidatedBalanceSheets" xlink:href="rubi-20191231.xsd#ConsolidatedBalanceSheets" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:href="rubi-20191231.xsd#ConsolidatedBalanceSheetsParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/ConsolidatedStatementOfCashFlows" xlink:href="rubi-20191231.xsd#ConsolidatedStatementOfCashFlows" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/ConsolidatedStatementsOfComprehensiveLoss" xlink:href="rubi-20191231.xsd#ConsolidatedStatementsOfComprehensiveLoss" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/ConsolidatedStatementsOfOperations" xlink:href="rubi-20191231.xsd#ConsolidatedStatementsOfOperations" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/ConsolidatedStatementsOfStockholdersEquityDeficit" xlink:href="rubi-20191231.xsd#ConsolidatedStatementsOfStockholdersEquityDeficit" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/CoverPage" xlink:href="rubi-20191231.xsd#CoverPage" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/Debt" xlink:href="rubi-20191231.xsd#Debt" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/DebtNarrativeDetails" xlink:href="rubi-20191231.xsd#DebtNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/FairValueMeasurements" xlink:href="rubi-20191231.xsd#FairValueMeasurements" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/FairValueMeasurementsFinancialInstrumentsDetails" xlink:href="rubi-20191231.xsd#FairValueMeasurementsFinancialInstrumentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/FairValueMeasurementsNarrativeDetails" xlink:href="rubi-20191231.xsd#FairValueMeasurementsNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/FairValueMeasurementsTables" xlink:href="rubi-20191231.xsd#FairValueMeasurementsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/GoodwillAndIntangibleAssets" xlink:href="rubi-20191231.xsd#GoodwillAndIntangibleAssets" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/GoodwillAndIntangibleAssetsFiniteLivedIntangibleAssetsDetails" xlink:href="rubi-20191231.xsd#GoodwillAndIntangibleAssetsFiniteLivedIntangibleAssetsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/GoodwillAndIntangibleAssetsFiniteLivedIntangibleAssetsFutureAmortizationExpenseDetails" xlink:href="rubi-20191231.xsd#GoodwillAndIntangibleAssetsFiniteLivedIntangibleAssetsFutureAmortizationExpenseDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/GoodwillAndIntangibleAssetsGoodwillActivityDetails" xlink:href="rubi-20191231.xsd#GoodwillAndIntangibleAssetsGoodwillActivityDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/GoodwillAndIntangibleAssetsNarrativeDetails" xlink:href="rubi-20191231.xsd#GoodwillAndIntangibleAssetsNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/GoodwillAndIntangibleAssetsTables" xlink:href="rubi-20191231.xsd#GoodwillAndIntangibleAssetsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/IncomeTaxes" xlink:href="rubi-20191231.xsd#IncomeTaxes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/IncomeTaxesComponentsOfIncomeTaxExpenseBenefitDetails" xlink:href="rubi-20191231.xsd#IncomeTaxesComponentsOfIncomeTaxExpenseBenefitDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/IncomeTaxesDeferredTaxAssetsAndLiabilitiesDetails" xlink:href="rubi-20191231.xsd#IncomeTaxesDeferredTaxAssetsAndLiabilitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/IncomeTaxesEffectiveIncomeTaxRateReconciliationDetails" xlink:href="rubi-20191231.xsd#IncomeTaxesEffectiveIncomeTaxRateReconciliationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/IncomeTaxesIncomeBeforeIncomeTaxDomesticAndForeignDetails" xlink:href="rubi-20191231.xsd#IncomeTaxesIncomeBeforeIncomeTaxDomesticAndForeignDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/IncomeTaxesNarrativeDetails" xlink:href="rubi-20191231.xsd#IncomeTaxesNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/IncomeTaxesTables" xlink:href="rubi-20191231.xsd#IncomeTaxesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/IncomeTaxesUnrecognizedTaxBenefitsDetails" xlink:href="rubi-20191231.xsd#IncomeTaxesUnrecognizedTaxBenefitsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/InternalUseSoftwareDevelopmentCosts" xlink:href="rubi-20191231.xsd#InternalUseSoftwareDevelopmentCosts" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/InternalUseSoftwareDevelopmentCostsDetails" xlink:href="rubi-20191231.xsd#InternalUseSoftwareDevelopmentCostsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/InternalUseSoftwareDevelopmentCostsNarrativeDetails" xlink:href="rubi-20191231.xsd#InternalUseSoftwareDevelopmentCostsNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/InternalUseSoftwareDevelopmentCostsTables" xlink:href="rubi-20191231.xsd#InternalUseSoftwareDevelopmentCostsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/Investments" xlink:href="rubi-20191231.xsd#Investments" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/InvestmentsInvestmentsInMarketableSecuritiesDetails" xlink:href="rubi-20191231.xsd#InvestmentsInvestmentsInMarketableSecuritiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/InvestmentsNarrativeDetails" xlink:href="rubi-20191231.xsd#InvestmentsNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/InvestmentsTables" xlink:href="rubi-20191231.xsd#InvestmentsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/Leases" xlink:href="rubi-20191231.xsd#Leases" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/LeasesNarrativeDetails" xlink:href="rubi-20191231.xsd#LeasesNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/LeasesScheduleOfFutureMinimumObligationIncludingSubleaseIncomeDetails" xlink:href="rubi-20191231.xsd#LeasesScheduleOfFutureMinimumObligationIncludingSubleaseIncomeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/LeasesScheduleOfLeaseLiabilityMaturitiesDetails" xlink:href="rubi-20191231.xsd#LeasesScheduleOfLeaseLiabilityMaturitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/LeasesScheduleOfLeaseLiabilityMaturitiesDetailsCalc2" xlink:href="rubi-20191231.xsd#LeasesScheduleOfLeaseLiabilityMaturitiesDetailsCalc2" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/LeasesTables" xlink:href="rubi-20191231.xsd#LeasesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/NatureOfOperations" xlink:href="rubi-20191231.xsd#NatureOfOperations" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/NetIncomeLossPerShare" xlink:href="rubi-20191231.xsd#NetIncomeLossPerShare" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/NetIncomeLossPerShareBasicAndDilutedEarningsPerShareDetails" xlink:href="rubi-20191231.xsd#NetIncomeLossPerShareBasicAndDilutedEarningsPerShareDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/NetIncomeLossPerShareSharesExcludedAndIncludedInCalculationOfDilutedEarningsPerShareDetails" xlink:href="rubi-20191231.xsd#NetIncomeLossPerShareSharesExcludedAndIncludedInCalculationOfDilutedEarningsPerShareDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/NetIncomeLossPerShareTables" xlink:href="rubi-20191231.xsd#NetIncomeLossPerShareTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/OrganizationAndSummaryOfSignificantAccountingPolicies" xlink:href="rubi-20191231.xsd#OrganizationAndSummaryOfSignificantAccountingPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesIntangibleAssetsDetails" xlink:href="rubi-20191231.xsd#OrganizationAndSummaryOfSignificantAccountingPoliciesIntangibleAssetsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesNarrativeDetails" xlink:href="rubi-20191231.xsd#OrganizationAndSummaryOfSignificantAccountingPoliciesNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:href="rubi-20191231.xsd#OrganizationAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesPropertyAndEquipmentDetails" xlink:href="rubi-20191231.xsd#OrganizationAndSummaryOfSignificantAccountingPoliciesPropertyAndEquipmentDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesTables" xlink:href="rubi-20191231.xsd#OrganizationAndSummaryOfSignificantAccountingPoliciesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/PropertyAndEquipment" xlink:href="rubi-20191231.xsd#PropertyAndEquipment" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/PropertyAndEquipmentDetails" xlink:href="rubi-20191231.xsd#PropertyAndEquipmentDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/PropertyAndEquipmentNarrativeDetails" xlink:href="rubi-20191231.xsd#PropertyAndEquipmentNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/PropertyAndEquipmentTables" xlink:href="rubi-20191231.xsd#PropertyAndEquipmentTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/QuarterlyFinancialDataUnaudited" xlink:href="rubi-20191231.xsd#QuarterlyFinancialDataUnaudited" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/QuarterlyFinancialDataUnauditedDetails" xlink:href="rubi-20191231.xsd#QuarterlyFinancialDataUnauditedDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/QuarterlyFinancialDataUnauditedTables" xlink:href="rubi-20191231.xsd#QuarterlyFinancialDataUnauditedTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/RelatedPartyTransaction" xlink:href="rubi-20191231.xsd#RelatedPartyTransaction" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/RestructuringAndOtherExitCosts" xlink:href="rubi-20191231.xsd#RestructuringAndOtherExitCosts" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/RestructuringAndOtherExitCostsNarrativeDetails" xlink:href="rubi-20191231.xsd#RestructuringAndOtherExitCostsNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/Revenues" xlink:href="rubi-20191231.xsd#Revenues" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/RevenuesDetails" xlink:href="rubi-20191231.xsd#RevenuesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/RevenuesRevenueDisaggregatedByGeographicLocationDetails" xlink:href="rubi-20191231.xsd#RevenuesRevenueDisaggregatedByGeographicLocationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/RevenuesRevenueDisaggregatedBySalesDistributionChannelDetails" xlink:href="rubi-20191231.xsd#RevenuesRevenueDisaggregatedBySalesDistributionChannelDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/RevenuesTables" xlink:href="rubi-20191231.xsd#RevenuesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/StockBasedCompensation" xlink:href="rubi-20191231.xsd#StockBasedCompensation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/StockBasedCompensationDetails" xlink:href="rubi-20191231.xsd#StockBasedCompensationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/StockBasedCompensationEmployeeStockPurchasePlanNarrativeDetails" xlink:href="rubi-20191231.xsd#StockBasedCompensationEmployeeStockPurchasePlanNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/StockBasedCompensationExpenseDetails" xlink:href="rubi-20191231.xsd#StockBasedCompensationExpenseDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/StockBasedCompensationRestrictedStockActivityDetails" xlink:href="rubi-20191231.xsd#StockBasedCompensationRestrictedStockActivityDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/StockBasedCompensationRestrictedStockNarrativeDetails" xlink:href="rubi-20191231.xsd#StockBasedCompensationRestrictedStockNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/StockBasedCompensationRestrictedStockUnitsActivityDetails" xlink:href="rubi-20191231.xsd#StockBasedCompensationRestrictedStockUnitsActivityDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/StockBasedCompensationStockOptionsNarrativeDetails" xlink:href="rubi-20191231.xsd#StockBasedCompensationStockOptionsNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/StockBasedCompensationStockOptionsOutstandingDetails" xlink:href="rubi-20191231.xsd#StockBasedCompensationStockOptionsOutstandingDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/StockBasedCompensationTables" xlink:href="rubi-20191231.xsd#StockBasedCompensationTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.rubiconproject.com/role/StockBasedCompensationValuationAssumptionsDetails" xlink:href="rubi-20191231.xsd#StockBasedCompensationValuationAssumptionsDetails" xlink:type="simple" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/AccountsPayableAndAccruedExpenses" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/AccountsPayableAndAccruedExpensesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_9a34fc5e-00bc-420c-8698-6e19b92b8e39" xlink:type="locator" />
    <link:loc xlink:href="rubi-20191231.xsd#rubi_AccountsPayableSellerCurrent" xlink:label="loc_rubi_AccountsPayableSellerCurrent_54f071b5-1c77-8e5d-fffa-2cde2a3e38df" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_9a34fc5e-00bc-420c-8698-6e19b92b8e39" xlink:to="loc_rubi_AccountsPayableSellerCurrent_54f071b5-1c77-8e5d-fffa-2cde2a3e38df" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsPayableTradeCurrent" xlink:label="loc_us-gaap_AccountsPayableTradeCurrent_51b23810-9c40-7332-bdd2-99200011c44c" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_9a34fc5e-00bc-420c-8698-6e19b92b8e39" xlink:to="loc_us-gaap_AccountsPayableTradeCurrent_51b23810-9c40-7332-bdd2-99200011c44c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_a2b836a7-cc87-0e4f-38a0-c91a29535622" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_9a34fc5e-00bc-420c-8698-6e19b92b8e39" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_a2b836a7-cc87-0e4f-38a0-c91a29535622" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/AccountsPayableAndAccruedExpensesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/AccumulatedOtherComprehensiveLoss" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/AccumulatedOtherComprehensiveLossScheduleOfComponentsOfAccumulatedOtherComprehensiveLossDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/AccumulatedOtherComprehensiveLossTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/BusinessCombinations" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/BusinessCombinationsAcquiredIntangibleAssetsAndEstimatedUsefulLivesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/BusinessCombinationsAllocationOfTotalPurchaseConsiderationsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/BusinessCombinationsNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/BusinessCombinationsTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/CommitmentsAndContingencies" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/CommitmentsAndContingenciesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/ConsolidatedBalanceSheets" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_17ef3f41-42f7-52c0-cba1-93e7e0e1116a" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_0b3bd361-d592-2906-279e-2682647fdd27" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_17ef3f41-42f7-52c0-cba1-93e7e0e1116a" xlink:to="loc_us-gaap_AssetsCurrent_0b3bd361-d592-2906-279e-2682647fdd27" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_1de780cc-9607-daa3-0bed-03c88ae94769" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_0b3bd361-d592-2906-279e-2682647fdd27" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_1de780cc-9607-daa3-0bed-03c88ae94769" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_dd2cbe99-77d2-db20-3c91-750589881c79" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_0b3bd361-d592-2906-279e-2682647fdd27" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_dd2cbe99-77d2-db20-3c91-750589881c79" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_5fd9c643-899e-95d7-aab9-c3a9d6240218" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_0b3bd361-d592-2906-279e-2682647fdd27" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_5fd9c643-899e-95d7-aab9-c3a9d6240218" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MarketableSecurities" xlink:label="loc_us-gaap_MarketableSecurities_86486b7b-7daf-2fff-5062-52b9f6fcac42" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_0b3bd361-d592-2906-279e-2682647fdd27" xlink:to="loc_us-gaap_MarketableSecurities_86486b7b-7daf-2fff-5062-52b9f6fcac42" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_4246ec24-1a4c-19dd-57c9-32d4a8e0cbaa" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_17ef3f41-42f7-52c0-cba1-93e7e0e1116a" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_4246ec24-1a4c-19dd-57c9-32d4a8e0cbaa" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_dcf3df0d-2155-35f6-715d-83a9bc9cf3fb" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_17ef3f41-42f7-52c0-cba1-93e7e0e1116a" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_dcf3df0d-2155-35f6-715d-83a9bc9cf3fb" xlink:type="arc" />
    <link:loc xlink:href="rubi-20191231.xsd#rubi_InternalUseSoftwareDevelopmentCostsNet" xlink:label="loc_rubi_InternalUseSoftwareDevelopmentCostsNet_c4ead0f2-9075-0bd6-6322-2cde2a453522" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_17ef3f41-42f7-52c0-cba1-93e7e0e1116a" xlink:to="loc_rubi_InternalUseSoftwareDevelopmentCostsNet_c4ead0f2-9075-0bd6-6322-2cde2a453522" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_8889606b-88fa-2d5e-3fb9-238bccdf9597" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_17ef3f41-42f7-52c0-cba1-93e7e0e1116a" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_8889606b-88fa-2d5e-3fb9-238bccdf9597" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_37b440e2-656c-b624-0688-b7cf681bf981" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_17ef3f41-42f7-52c0-cba1-93e7e0e1116a" xlink:to="loc_us-gaap_Goodwill_37b440e2-656c-b624-0688-b7cf681bf981" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_bd8545de-cfc2-6f31-bff6-ed0d4012c357" xlink:type="locator" />
    <link:calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_17ef3f41-42f7-52c0-cba1-93e7e0e1116a" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_bd8545de-cfc2-6f31-bff6-ed0d4012c357" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_d7f1ad03-6ed4-706a-15fc-eae794dee33a" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_44863786-cbc4-bac4-e070-0a1f19314584" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_d7f1ad03-6ed4-706a-15fc-eae794dee33a" xlink:to="loc_us-gaap_Liabilities_44863786-cbc4-bac4-e070-0a1f19314584" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_30dca50d-a7bd-cff0-949a-3d7ae869c50d" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_44863786-cbc4-bac4-e070-0a1f19314584" xlink:to="loc_us-gaap_LiabilitiesCurrent_30dca50d-a7bd-cff0-949a-3d7ae869c50d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_9a34fc5e-00bc-420c-8698-6e19b92b8e39" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_30dca50d-a7bd-cff0-949a-3d7ae869c50d" xlink:to="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_9a34fc5e-00bc-420c-8698-6e19b92b8e39" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityCurrent" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_b91d2f01-85c2-f9fb-3250-26a4b1b39c5e" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_30dca50d-a7bd-cff0-949a-3d7ae869c50d" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_b91d2f01-85c2-f9fb-3250-26a4b1b39c5e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherLiabilitiesCurrent" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_ebb4c1f8-b5df-aab0-ee90-1e91fd21cf92" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_30dca50d-a7bd-cff0-949a-3d7ae869c50d" xlink:to="loc_us-gaap_OtherLiabilitiesCurrent_ebb4c1f8-b5df-aab0-ee90-1e91fd21cf92" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_d18f979c-644d-9e92-9e89-21cfd1312948" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_44863786-cbc4-bac4-e070-0a1f19314584" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_d18f979c-644d-9e92-9e89-21cfd1312948" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_8c850143-cd0c-0f85-9038-e19d8c4f7808" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_44863786-cbc4-bac4-e070-0a1f19314584" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_8c850143-cd0c-0f85-9038-e19d8c4f7808" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_4b9904d8-8624-0dbb-a949-29ff2cf808a8" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_d7f1ad03-6ed4-706a-15fc-eae794dee33a" xlink:to="loc_us-gaap_StockholdersEquity_4b9904d8-8624-0dbb-a949-29ff2cf808a8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaap_CommonStockValue_f05ab245-2bd1-7865-e7ed-1461a5a6155f" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_4b9904d8-8624-0dbb-a949-29ff2cf808a8" xlink:to="loc_us-gaap_CommonStockValue_f05ab245-2bd1-7865-e7ed-1461a5a6155f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="loc_us-gaap_AdditionalPaidInCapital_3d5a0ca6-0f59-67e6-adb5-6aecd22b693b" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_4b9904d8-8624-0dbb-a949-29ff2cf808a8" xlink:to="loc_us-gaap_AdditionalPaidInCapital_3d5a0ca6-0f59-67e6-adb5-6aecd22b693b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_988c1346-b444-a867-fe80-f3aec1443d54" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_4b9904d8-8624-0dbb-a949-29ff2cf808a8" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_988c1346-b444-a867-fe80-f3aec1443d54" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_62305d8f-d807-0fe8-d0ab-f2c2b3d03011" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_4b9904d8-8624-0dbb-a949-29ff2cf808a8" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_62305d8f-d807-0fe8-d0ab-f2c2b3d03011" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="loc_us-gaap_PreferredStockValue_928e20af-e738-4a2d-05b8-cf88fed11953" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_4b9904d8-8624-0dbb-a949-29ff2cf808a8" xlink:to="loc_us-gaap_PreferredStockValue_928e20af-e738-4a2d-05b8-cf88fed11953" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaap_CommitmentsAndContingencies_4d934b0d-59bc-ae5c-ffb9-b6ced82ff9f8" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_d7f1ad03-6ed4-706a-15fc-eae794dee33a" xlink:to="loc_us-gaap_CommitmentsAndContingencies_4d934b0d-59bc-ae5c-ffb9-b6ced82ff9f8" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/ConsolidatedStatementOfCashFlows" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_50231013-f048-89e7-0e20-ba139224c5f7" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_50231013-f048-89e7-0e20-ba139224c5f7" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_e170ce1e-c3a8-e8ee-88b0-37e8dd7b1d11" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_us-gaap_NetIncomeLoss_e170ce1e-c3a8-e8ee-88b0-37e8dd7b1d11" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_ebef248a-da21-637d-9d28-3d42ff90e8e2" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_ebef248a-da21-637d-9d28-3d42ff90e8e2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_f0b9d825-b0b9-37fd-4d25-9294a8598890" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_us-gaap_ShareBasedCompensation_f0b9d825-b0b9-37fd-4d25-9294a8598890" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GainLossOnSaleOfPropertyPlantEquipment" xlink:label="loc_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_ae064a9e-7563-5fa2-95b8-bfe0f620685d" xlink:type="locator" />
    <link:calculationArc order="4" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_ae064a9e-7563-5fa2-95b8-bfe0f620685d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProvisionForDoubtfulAccounts" xlink:label="loc_us-gaap_ProvisionForDoubtfulAccounts_5ae19a9f-6de6-075a-2c5a-a587d82ebad5" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_us-gaap_ProvisionForDoubtfulAccounts_5ae19a9f-6de6-075a-2c5a-a587d82ebad5" xlink:type="arc" />
    <link:loc xlink:href="rubi-20191231.xsd#rubi_AccretionOfAvailableForSaleSecurities" xlink:label="loc_rubi_AccretionOfAvailableForSaleSecurities_d14ee724-ffdb-5799-3d94-2cde2a0a0597" xlink:type="locator" />
    <link:calculationArc order="6" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_rubi_AccretionOfAvailableForSaleSecurities_d14ee724-ffdb-5799-3d94-2cde2a0a0597" xlink:type="arc" />
    <link:loc xlink:href="rubi-20191231.xsd#rubi_NonCashLeaseExpense" xlink:label="loc_rubi_NonCashLeaseExpense_4908E9A53441831715C1406C2F766D4E" xlink:type="locator" />
    <link:calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_rubi_NonCashLeaseExpense_4908E9A53441831715C1406C2F766D4E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredIncomeTaxesAndTaxCredits" xlink:label="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_9a5dd9a5-8471-2942-da95-5c0a29bbe3b1" xlink:type="locator" />
    <link:calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_9a5dd9a5-8471-2942-da95-5c0a29bbe3b1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignCurrencyTransactionGainLossUnrealized" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossUnrealized_71f47be9-f88f-b596-0981-57b65c400f18" xlink:type="locator" />
    <link:calculationArc order="9" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossUnrealized_71f47be9-f88f-b596-0981-57b65c400f18" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_09b7b41a-f5a1-c45e-d61b-846fff462802" xlink:type="locator" />
    <link:calculationArc order="10" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_09b7b41a-f5a1-c45e-d61b-846fff462802" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_dfcbd6f7-83fa-00c2-bd9e-6c5c1de7d890" xlink:type="locator" />
    <link:calculationArc order="11" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_dfcbd6f7-83fa-00c2-bd9e-6c5c1de7d890" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_7c1c3153-d95c-50b8-10ed-a75d1f3d7a68" xlink:type="locator" />
    <link:calculationArc order="12" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_7c1c3153-d95c-50b8-10ed-a75d1f3d7a68" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_d7de2883-fea4-6e7c-2c8b-7fee9aa34369" xlink:type="locator" />
    <link:calculationArc order="13" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_d7de2883-fea4-6e7c-2c8b-7fee9aa34369" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0f07a806-a2da-6d18-a7a9-d734fad1f3b0" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_50231013-f048-89e7-0e20-ba139224c5f7" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0f07a806-a2da-6d18-a7a9-d734fad1f3b0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_0f8df60b-841f-6df5-83c3-e4049d366459" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0f07a806-a2da-6d18-a7a9-d734fad1f3b0" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_0f8df60b-841f-6df5-83c3-e4049d366459" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToDevelopSoftware" xlink:label="loc_us-gaap_PaymentsToDevelopSoftware_ba1e11af-74fd-e63a-aae9-2b973bec2b61" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0f07a806-a2da-6d18-a7a9-d734fad1f3b0" xlink:to="loc_us-gaap_PaymentsToDevelopSoftware_ba1e11af-74fd-e63a-aae9-2b973bec2b61" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt" xlink:label="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_8b51ae5f-8f14-ae0e-00e7-8f4e716f2f96" xlink:type="locator" />
    <link:calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0f07a806-a2da-6d18-a7a9-d734fad1f3b0" xlink:to="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_8b51ae5f-8f14-ae0e-00e7-8f4e716f2f96" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities" xlink:label="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_e3f9215c-1f64-e636-ccb3-9c51d05b0a6d" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0f07a806-a2da-6d18-a7a9-d734fad1f3b0" xlink:to="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_e3f9215c-1f64-e636-ccb3-9c51d05b0a6d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt" xlink:label="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_d1d20cfe-f038-824a-0236-247c2a122ebc" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0f07a806-a2da-6d18-a7a9-d734fad1f3b0" xlink:to="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_d1d20cfe-f038-824a-0236-247c2a122ebc" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_6abb14d9-7978-302d-af6b-dbfc88f76bf2" xlink:type="locator" />
    <link:calculationArc order="6" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0f07a806-a2da-6d18-a7a9-d734fad1f3b0" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_6abb14d9-7978-302d-af6b-dbfc88f76bf2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_1efd93c0-bb90-2a64-a997-3a70afaa3faa" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_50231013-f048-89e7-0e20-ba139224c5f7" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_1efd93c0-bb90-2a64-a997-3a70afaa3faa" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_07e50027-f2db-6d1b-93ed-b22d6bd39351" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_1efd93c0-bb90-2a64-a997-3a70afaa3faa" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_07e50027-f2db-6d1b-93ed-b22d6bd39351" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromStockOptionsExercised" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_f73833cd-0af4-c4d5-a7c4-1151269f1da3" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_1efd93c0-bb90-2a64-a997-3a70afaa3faa" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_f73833cd-0af4-c4d5-a7c4-1151269f1da3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_3b304564-1a0d-03c8-a331-770e72d1f6fc" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_1efd93c0-bb90-2a64-a997-3a70afaa3faa" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_3b304564-1a0d-03c8-a331-770e72d1f6fc" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_6bd7c3da-2a5b-cbc6-d33a-bb097a23c2f6" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_50231013-f048-89e7-0e20-ba139224c5f7" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_6bd7c3da-2a5b-cbc6-d33a-bb097a23c2f6" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/ConsolidatedStatementsOfComprehensiveLoss" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_5c8b3520-1ca2-0a91-0912-70d62831826c" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_e170ce1e-c3a8-e8ee-88b0-37e8dd7b1d11" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_5c8b3520-1ca2-0a91-0912-70d62831826c" xlink:to="loc_us-gaap_NetIncomeLoss_e170ce1e-c3a8-e8ee-88b0-37e8dd7b1d11" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_5e0cb0dc-b25c-aaae-62f8-cb90f31a16a1" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_5c8b3520-1ca2-0a91-0912-70d62831826c" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_5e0cb0dc-b25c-aaae-62f8-cb90f31a16a1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_06dfb931-62f3-bab4-4c41-dbf77bf8befd" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_5e0cb0dc-b25c-aaae-62f8-cb90f31a16a1" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_06dfb931-62f3-bab4-4c41-dbf77bf8befd" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_71d11517-34f8-505e-4c4b-e25ef3111aee" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_5e0cb0dc-b25c-aaae-62f8-cb90f31a16a1" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_71d11517-34f8-505e-4c4b-e25ef3111aee" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/ConsolidatedStatementsOfOperations" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_e170ce1e-c3a8-e8ee-88b0-37e8dd7b1d11" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_489b61b6-7c39-240c-7f68-1c1675bca3b7" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_e170ce1e-c3a8-e8ee-88b0-37e8dd7b1d11" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_489b61b6-7c39-240c-7f68-1c1675bca3b7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_8db01d6d-ae17-523f-94b9-8ab4add4a22e" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_489b61b6-7c39-240c-7f68-1c1675bca3b7" xlink:to="loc_us-gaap_OperatingIncomeLoss_8db01d6d-ae17-523f-94b9-8ab4add4a22e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_425ada39-f194-a279-47ac-dd09cf899fb1" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_8db01d6d-ae17-523f-94b9-8ab4add4a22e" xlink:to="loc_us-gaap_Revenues_425ada39-f194-a279-47ac-dd09cf899fb1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CostsAndExpenses" xlink:label="loc_us-gaap_CostsAndExpenses_76d25f63-60a6-4deb-1fd0-84a3d98fe881" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_8db01d6d-ae17-523f-94b9-8ab4add4a22e" xlink:to="loc_us-gaap_CostsAndExpenses_76d25f63-60a6-4deb-1fd0-84a3d98fe881" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CostOfRevenue" xlink:label="loc_us-gaap_CostOfRevenue_b362f93c-0412-ea6c-3d48-01ede1ed7f3f" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_76d25f63-60a6-4deb-1fd0-84a3d98fe881" xlink:to="loc_us-gaap_CostOfRevenue_b362f93c-0412-ea6c-3d48-01ede1ed7f3f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SellingAndMarketingExpense" xlink:label="loc_us-gaap_SellingAndMarketingExpense_731c29d0-c256-edba-6ba9-ec31b7c2ca7b" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_76d25f63-60a6-4deb-1fd0-84a3d98fe881" xlink:to="loc_us-gaap_SellingAndMarketingExpense_731c29d0-c256-edba-6ba9-ec31b7c2ca7b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_ef2ac9e8-006f-b467-3389-9a8ceec4bee5" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_76d25f63-60a6-4deb-1fd0-84a3d98fe881" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_ef2ac9e8-006f-b467-3389-9a8ceec4bee5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_58462a12-ec5e-da2d-89ad-2d8b2ce76259" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_76d25f63-60a6-4deb-1fd0-84a3d98fe881" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_58462a12-ec5e-da2d-89ad-2d8b2ce76259" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestructuringCharges" xlink:label="loc_us-gaap_RestructuringCharges_d445215a-3b87-2f11-ac68-3256f2f2966f" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_76d25f63-60a6-4deb-1fd0-84a3d98fe881" xlink:to="loc_us-gaap_RestructuringCharges_d445215a-3b87-2f11-ac68-3256f2f2966f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_28fe77ae-e122-e428-d718-aff2ad445bc8" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_489b61b6-7c39-240c-7f68-1c1675bca3b7" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_28fe77ae-e122-e428-d718-aff2ad445bc8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestIncomeExpenseNet" xlink:label="loc_us-gaap_InterestIncomeExpenseNet_17d6fb00-d8ca-12a7-45aa-c9b702218c16" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_28fe77ae-e122-e428-d718-aff2ad445bc8" xlink:to="loc_us-gaap_InterestIncomeExpenseNet_17d6fb00-d8ca-12a7-45aa-c9b702218c16" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherOperatingIncome" xlink:label="loc_us-gaap_OtherOperatingIncome_36b227bd-c535-d740-a800-db444cbb5ca2" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_28fe77ae-e122-e428-d718-aff2ad445bc8" xlink:to="loc_us-gaap_OtherOperatingIncome_36b227bd-c535-d740-a800-db444cbb5ca2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignCurrencyTransactionGainLossBeforeTax" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_96cf6261-5089-1df3-fbfc-c8c8918673b4" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_28fe77ae-e122-e428-d718-aff2ad445bc8" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_96cf6261-5089-1df3-fbfc-c8c8918673b4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_666ca9f0-28f1-b21a-025e-36222808a6c3" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_e170ce1e-c3a8-e8ee-88b0-37e8dd7b1d11" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_666ca9f0-28f1-b21a-025e-36222808a6c3" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/ConsolidatedStatementsOfStockholdersEquityDeficit" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/CoverPage" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/Debt" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/DebtNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/FairValueMeasurements" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/FairValueMeasurementsFinancialInstrumentsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/FairValueMeasurementsNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/FairValueMeasurementsTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/GoodwillAndIntangibleAssets" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/GoodwillAndIntangibleAssetsFiniteLivedIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_e87bd6a3-2026-a858-f41a-bc281e5d594b" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_e11e8784-8f2d-ca3c-a9e8-a8115d54520c" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_e87bd6a3-2026-a858-f41a-bc281e5d594b" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_e11e8784-8f2d-ca3c-a9e8-a8115d54520c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_65140cb5-12a8-2030-97e2-fa6daceadf40" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_e87bd6a3-2026-a858-f41a-bc281e5d594b" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_65140cb5-12a8-2030-97e2-fa6daceadf40" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/GoodwillAndIntangibleAssetsFiniteLivedIntangibleAssetsFutureAmortizationExpenseDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_e87bd6a3-2026-a858-f41a-bc281e5d594b" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_52d5fc42-d7bd-e657-728c-68a54a8a27d9" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_e87bd6a3-2026-a858-f41a-bc281e5d594b" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_52d5fc42-d7bd-e657-728c-68a54a8a27d9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_28209536-91f9-47af-f5bd-6accbeed43b7" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_e87bd6a3-2026-a858-f41a-bc281e5d594b" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_28209536-91f9-47af-f5bd-6accbeed43b7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_db859267-14f1-73e3-47c3-03bfc9627628" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_e87bd6a3-2026-a858-f41a-bc281e5d594b" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_db859267-14f1-73e3-47c3-03bfc9627628" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_716ff456-95a9-c7d8-efd5-2047c2ac3646" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_e87bd6a3-2026-a858-f41a-bc281e5d594b" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_716ff456-95a9-c7d8-efd5-2047c2ac3646" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_cddb4eb0-3110-27ee-28d5-5d7adef4fa0c" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_e87bd6a3-2026-a858-f41a-bc281e5d594b" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_cddb4eb0-3110-27ee-28d5-5d7adef4fa0c" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/GoodwillAndIntangibleAssetsGoodwillActivityDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/GoodwillAndIntangibleAssetsNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/GoodwillAndIntangibleAssetsTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/IncomeTaxes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/IncomeTaxesComponentsOfIncomeTaxExpenseBenefitDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_666ca9f0-28f1-b21a-025e-36222808a6c3" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_3421bed6-296e-da4e-f0e9-a2a8fa1f6d19" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_666ca9f0-28f1-b21a-025e-36222808a6c3" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_3421bed6-296e-da4e-f0e9-a2a8fa1f6d19" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredFederalIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_db02e614-93e7-eddf-abe0-a58cca48e685" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_3421bed6-296e-da4e-f0e9-a2a8fa1f6d19" xlink:to="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_db02e614-93e7-eddf-abe0-a58cca48e685" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_ca5c17e6-16a0-bee8-1413-d316d82a8942" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_3421bed6-296e-da4e-f0e9-a2a8fa1f6d19" xlink:to="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_ca5c17e6-16a0-bee8-1413-d316d82a8942" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredForeignIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredForeignIncomeTaxExpenseBenefit_8caef893-a841-2be2-863f-e20b53026f02" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_3421bed6-296e-da4e-f0e9-a2a8fa1f6d19" xlink:to="loc_us-gaap_DeferredForeignIncomeTaxExpenseBenefit_8caef893-a841-2be2-863f-e20b53026f02" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_ad87dc87-7206-5d76-a1ae-6cecdf90521c" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_666ca9f0-28f1-b21a-025e-36222808a6c3" xlink:to="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_ad87dc87-7206-5d76-a1ae-6cecdf90521c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CurrentFederalTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentFederalTaxExpenseBenefit_1007d9fe-6d83-c6c6-eef9-c29803b14ec7" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_ad87dc87-7206-5d76-a1ae-6cecdf90521c" xlink:to="loc_us-gaap_CurrentFederalTaxExpenseBenefit_1007d9fe-6d83-c6c6-eef9-c29803b14ec7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_7f37ab3b-992e-e1ba-f578-2c503524d7e4" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_ad87dc87-7206-5d76-a1ae-6cecdf90521c" xlink:to="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_7f37ab3b-992e-e1ba-f578-2c503524d7e4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CurrentForeignTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentForeignTaxExpenseBenefit_dbb037c2-04c0-fa14-65e6-8ccd12d2a855" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_ad87dc87-7206-5d76-a1ae-6cecdf90521c" xlink:to="loc_us-gaap_CurrentForeignTaxExpenseBenefit_dbb037c2-04c0-fa14-65e6-8ccd12d2a855" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/IncomeTaxesDeferredTaxAssetsAndLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:label="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_0bdbea13-bfd8-228d-43ea-fae0c1330aaa" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredIncomeTaxLiabilities" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_15e17ec2-d527-455f-b2cd-0be7f92a9fd5" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_0bdbea13-bfd8-228d-43ea-fae0c1330aaa" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilities_15e17ec2-d527-455f-b2cd-0be7f92a9fd5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_fee9ac69-74b7-a6ae-6ad8-e6860d7cdb9d" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_15e17ec2-d527-455f-b2cd-0be7f92a9fd5" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_fee9ac69-74b7-a6ae-6ad8-e6860d7cdb9d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssets" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssets_a1d6e3d5-1382-48b3-8ff7-0e4305825a45" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_15e17ec2-d527-455f-b2cd-0be7f92a9fd5" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssets_a1d6e3d5-1382-48b3-8ff7-0e4305825a45" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsNet" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_e6f5d9f5-2430-5e17-896c-5e4d69815366" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_0bdbea13-bfd8-228d-43ea-fae0c1330aaa" xlink:to="loc_us-gaap_DeferredTaxAssetsNet_e6f5d9f5-2430-5e17-896c-5e4d69815366" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsGross" xlink:label="loc_us-gaap_DeferredTaxAssetsGross_e54f6543-25d5-ceb9-ff71-ca6ba1b37623" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_e6f5d9f5-2430-5e17-896c-5e4d69815366" xlink:to="loc_us-gaap_DeferredTaxAssetsGross_e54f6543-25d5-ceb9-ff71-ca6ba1b37623" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities_ac4e5578-f94c-fdad-c074-80060476cdef" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_e54f6543-25d5-ceb9-ff71-ca6ba1b37623" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities_ac4e5578-f94c-fdad-c074-80060476cdef" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_de5e795f-0165-d088-d22e-d01ff8d44317" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_e54f6543-25d5-ceb9-ff71-ca6ba1b37623" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_de5e795f-0165-d088-d22e-d01ff8d44317" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwards" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_bc5d002e-802f-bf1e-7d7d-9f1d1a7551a7" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_e54f6543-25d5-ceb9-ff71-ca6ba1b37623" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_bc5d002e-802f-bf1e-7d7d-9f1d1a7551a7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch_2923c663-d6ea-ecbc-ca18-63a6f8140ce1" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_e54f6543-25d5-ceb9-ff71-ca6ba1b37623" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch_2923c663-d6ea-ecbc-ca18-63a6f8140ce1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsOther" xlink:label="loc_us-gaap_DeferredTaxAssetsOther_a87b79d6-1ed8-a71d-1843-5c0769713f28" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_e54f6543-25d5-ceb9-ff71-ca6ba1b37623" xlink:to="loc_us-gaap_DeferredTaxAssetsOther_a87b79d6-1ed8-a71d-1843-5c0769713f28" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_55b78dfc-faa8-3c71-752a-e6857318d516" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_e6f5d9f5-2430-5e17-896c-5e4d69815366" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_55b78dfc-faa8-3c71-752a-e6857318d516" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/IncomeTaxesEffectiveIncomeTaxRateReconciliationDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_aa9fb8cf-e50d-6d5b-0236-a084fee29894" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_5ef0c8c5-04c5-1c10-a59e-3eaa9cf923b4" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_aa9fb8cf-e50d-6d5b-0236-a084fee29894" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_5ef0c8c5-04c5-1c10-a59e-3eaa9cf923b4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_fa285cf0-c43f-6ef0-a0f2-c37d958f2fe4" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_aa9fb8cf-e50d-6d5b-0236-a084fee29894" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_fa285cf0-c43f-6ef0-a0f2-c37d958f2fe4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential_cb745973-9398-b1e8-0b84-89b40fb91052" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_aa9fb8cf-e50d-6d5b-0236-a084fee29894" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential_cb745973-9398-b1e8-0b84-89b40fb91052" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost_8a96a0f2-2ed9-024e-417b-ed20a968d49f" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_aa9fb8cf-e50d-6d5b-0236-a084fee29894" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost_8a96a0f2-2ed9-024e-417b-ed20a968d49f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMealsAndEntertainment" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMealsAndEntertainment_0882b47d-c742-4f3a-84cc-b29d69b541e5" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_aa9fb8cf-e50d-6d5b-0236-a084fee29894" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMealsAndEntertainment_0882b47d-c742-4f3a-84cc-b29d69b541e5" xlink:type="arc" />
    <link:loc xlink:href="rubi-20191231.xsd#rubi_EffectiveIncomeTaxRateReconciliationIntercompanyFinancingCharges" xlink:label="loc_rubi_EffectiveIncomeTaxRateReconciliationIntercompanyFinancingCharges_eb669190-7594-da47-3c4a-2cde29e1b9bc" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_aa9fb8cf-e50d-6d5b-0236-a084fee29894" xlink:to="loc_rubi_EffectiveIncomeTaxRateReconciliationIntercompanyFinancingCharges_eb669190-7594-da47-3c4a-2cde29e1b9bc" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther_631ea6c6-f758-7a94-e1aa-04c5f19d6b4b" xlink:type="locator" />
    <link:calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_aa9fb8cf-e50d-6d5b-0236-a084fee29894" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther_631ea6c6-f758-7a94-e1aa-04c5f19d6b4b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_77b9f787-6596-82cb-4698-f0991c80113b" xlink:type="locator" />
    <link:calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_aa9fb8cf-e50d-6d5b-0236-a084fee29894" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_77b9f787-6596-82cb-4698-f0991c80113b" xlink:type="arc" />
    <link:loc xlink:href="rubi-20191231.xsd#rubi_EffectiveIncomeTaxRateReconciliationOfficersCompensationPercent" xlink:label="loc_rubi_EffectiveIncomeTaxRateReconciliationOfficersCompensationPercent_9048582B6B0D0ECF5832534315E452A9" xlink:type="locator" />
    <link:calculationArc order="9" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_aa9fb8cf-e50d-6d5b-0236-a084fee29894" xlink:to="loc_rubi_EffectiveIncomeTaxRateReconciliationOfficersCompensationPercent_9048582B6B0D0ECF5832534315E452A9" xlink:type="arc" />
    <link:loc xlink:href="rubi-20191231.xsd#rubi_EffectiveIncomeTaxRateReconciliationReturnAdjustmentProvision" xlink:label="loc_rubi_EffectiveIncomeTaxRateReconciliationReturnAdjustmentProvision_DD8FAB1DA4517C4DD2145345D084DD42" xlink:type="locator" />
    <link:calculationArc order="10" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_aa9fb8cf-e50d-6d5b-0236-a084fee29894" xlink:to="loc_rubi_EffectiveIncomeTaxRateReconciliationReturnAdjustmentProvision_DD8FAB1DA4517C4DD2145345D084DD42" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/IncomeTaxesIncomeBeforeIncomeTaxDomesticAndForeignDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_d71649eb-5769-933d-7982-2a2ada9ea257" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_3ce82195-ed3e-f261-3529-b3a868ecf6c4" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_d71649eb-5769-933d-7982-2a2ada9ea257" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_3ce82195-ed3e-f261-3529-b3a868ecf6c4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign_89ebd542-78ee-71d0-be95-65de1bb3ef82" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_d71649eb-5769-933d-7982-2a2ada9ea257" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign_89ebd542-78ee-71d0-be95-65de1bb3ef82" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/IncomeTaxesNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/IncomeTaxesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/IncomeTaxesUnrecognizedTaxBenefitsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/InternalUseSoftwareDevelopmentCosts" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/InternalUseSoftwareDevelopmentCostsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalizedComputerSoftwareNet" xlink:label="loc_us-gaap_CapitalizedComputerSoftwareNet_fba23373-de6f-ce17-8b6b-96f07be02197" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalizedComputerSoftwareGross" xlink:label="loc_us-gaap_CapitalizedComputerSoftwareGross_5c208d3b-f56b-068e-b2b4-78df423e56a3" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CapitalizedComputerSoftwareNet_fba23373-de6f-ce17-8b6b-96f07be02197" xlink:to="loc_us-gaap_CapitalizedComputerSoftwareGross_5c208d3b-f56b-068e-b2b4-78df423e56a3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalizedComputerSoftwareAccumulatedAmortization" xlink:label="loc_us-gaap_CapitalizedComputerSoftwareAccumulatedAmortization_c7dbee96-8bc1-3df4-6cc6-a0754c720961" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CapitalizedComputerSoftwareNet_fba23373-de6f-ce17-8b6b-96f07be02197" xlink:to="loc_us-gaap_CapitalizedComputerSoftwareAccumulatedAmortization_c7dbee96-8bc1-3df4-6cc6-a0754c720961" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/InternalUseSoftwareDevelopmentCostsNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/InternalUseSoftwareDevelopmentCostsTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/Investments" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/InvestmentsInvestmentsInMarketableSecuritiesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_27940abc-0cb4-eab4-8ef0-df4a4c0bb415" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_9fbaf9cb-468f-3b91-9cf2-18d26152173d" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_27940abc-0cb4-eab4-8ef0-df4a4c0bb415" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_9fbaf9cb-468f-3b91-9cf2-18d26152173d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_a23ab896-034e-8e96-1a84-63ffb40e496e" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_27940abc-0cb4-eab4-8ef0-df4a4c0bb415" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_a23ab896-034e-8e96-1a84-63ffb40e496e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_e562c48b-3e99-2c57-8e96-c3b81056b58c" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_27940abc-0cb4-eab4-8ef0-df4a4c0bb415" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_e562c48b-3e99-2c57-8e96-c3b81056b58c" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/InvestmentsNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/InvestmentsTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/Leases" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/LeasesNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/LeasesScheduleOfFutureMinimumObligationIncludingSubleaseIncomeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/LeasesScheduleOfLeaseLiabilityMaturitiesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_1c2cd15f-6a97-015f-b126-1d0a0750698b" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_5ad4ca01-bc52-b198-b1fd-3cded668d167" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_1c2cd15f-6a97-015f-b126-1d0a0750698b" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_5ad4ca01-bc52-b198-b1fd-3cded668d167" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_9b040bc1-f43c-735d-05f7-679f319d2bb6" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_1c2cd15f-6a97-015f-b126-1d0a0750698b" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_9b040bc1-f43c-735d-05f7-679f319d2bb6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_2f0ec234-4f20-7099-efb3-3c0ab4d024dd" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_1c2cd15f-6a97-015f-b126-1d0a0750698b" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_2f0ec234-4f20-7099-efb3-3c0ab4d024dd" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_1ed751b1-5f94-4f6f-41e9-ef873c9f2bab" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_1c2cd15f-6a97-015f-b126-1d0a0750698b" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_1ed751b1-5f94-4f6f-41e9-ef873c9f2bab" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_8a8de21f-aadc-3af7-8c96-d54cf42b401b" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_1c2cd15f-6a97-015f-b126-1d0a0750698b" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_8a8de21f-aadc-3af7-8c96-d54cf42b401b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_b411eec9-2a0a-356b-e751-bd0680ab4d58" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_1c2cd15f-6a97-015f-b126-1d0a0750698b" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_b411eec9-2a0a-356b-e751-bd0680ab4d58" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/LeasesScheduleOfLeaseLiabilityMaturitiesDetailsCalc2" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_1969568A587C69CB00FE825EC43AC279_1c2cd15f-6a97-015f-b126-1d0a0750698b" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_1969568A587C69CB00FE825EC43AC279_07815ffa-512a-3133-dcbb-38e09d2626b9" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_1969568A587C69CB00FE825EC43AC279_1c2cd15f-6a97-015f-b126-1d0a0750698b" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_1969568A587C69CB00FE825EC43AC279_07815ffa-512a-3133-dcbb-38e09d2626b9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiability" xlink:label="loc_us-gaap_OperatingLeaseLiability_1969568A587C69CB00FE825EC43AC279_b983c2d8-8318-0a7e-1a5c-6ab2933f7be5" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_1969568A587C69CB00FE825EC43AC279_1c2cd15f-6a97-015f-b126-1d0a0750698b" xlink:to="loc_us-gaap_OperatingLeaseLiability_1969568A587C69CB00FE825EC43AC279_b983c2d8-8318-0a7e-1a5c-6ab2933f7be5" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/LeasesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/NatureOfOperations" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/NetIncomeLossPerShare" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/NetIncomeLossPerShareBasicAndDilutedEarningsPerShareDetails" xlink:type="extended">
    <link:loc xlink:href="rubi-20191231.xsd#rubi_WeightedAverageNumberOfSharesOutstandingUsedToComputeEarningsPerShareBasicAndDiluted" xlink:label="loc_rubi_WeightedAverageNumberOfSharesOutstandingUsedToComputeEarningsPerShareBasicAndDiluted_57b03ace-f619-e463-744c-2cde29d45cc4" xlink:type="locator" />
    <link:loc xlink:href="rubi-20191231.xsd#rubi_WeightedAverageNumberOfSharesOutstandingIncludingUnvestedRestrictedSharesBasicandDiluted" xlink:label="loc_rubi_WeightedAverageNumberOfSharesOutstandingIncludingUnvestedRestrictedSharesBasicandDiluted_8c9b4d51-8a1e-bb7d-3407-44244b21ff0b" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_rubi_WeightedAverageNumberOfSharesOutstandingUsedToComputeEarningsPerShareBasicAndDiluted_57b03ace-f619-e463-744c-2cde29d45cc4" xlink:to="loc_rubi_WeightedAverageNumberOfSharesOutstandingIncludingUnvestedRestrictedSharesBasicandDiluted_8c9b4d51-8a1e-bb7d-3407-44244b21ff0b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesRestrictedStock" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesRestrictedStock_c747faed-c026-fc7a-0af1-d99661104464" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_rubi_WeightedAverageNumberOfSharesOutstandingUsedToComputeEarningsPerShareBasicAndDiluted_57b03ace-f619-e463-744c-2cde29d45cc4" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesRestrictedStock_c747faed-c026-fc7a-0af1-d99661104464" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/NetIncomeLossPerShareSharesExcludedAndIncludedInCalculationOfDilutedEarningsPerShareDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/NetIncomeLossPerShareTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/OrganizationAndSummaryOfSignificantAccountingPolicies" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesIntangibleAssetsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesPropertyAndEquipmentDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/PropertyAndEquipment" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/PropertyAndEquipmentDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_4246ec24-1a4c-19dd-57c9-32d4a8e0cbaa" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_94cd7971-9d17-1c6e-6642-d4d38fb682b6" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_4246ec24-1a4c-19dd-57c9-32d4a8e0cbaa" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_94cd7971-9d17-1c6e-6642-d4d38fb682b6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_7b7a3a8d-eb3d-0c85-68cc-b3d4d184ff23" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_4246ec24-1a4c-19dd-57c9-32d4a8e0cbaa" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_7b7a3a8d-eb3d-0c85-68cc-b3d4d184ff23" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/PropertyAndEquipmentNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/PropertyAndEquipmentTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/QuarterlyFinancialDataUnaudited" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/QuarterlyFinancialDataUnauditedDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/QuarterlyFinancialDataUnauditedTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/RelatedPartyTransaction" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/RestructuringAndOtherExitCosts" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/RestructuringAndOtherExitCostsNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/Revenues" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/RevenuesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/RevenuesRevenueDisaggregatedByGeographicLocationDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/RevenuesRevenueDisaggregatedBySalesDistributionChannelDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/RevenuesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/StockBasedCompensation" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/StockBasedCompensationDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/StockBasedCompensationEmployeeStockPurchasePlanNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/StockBasedCompensationExpenseDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/StockBasedCompensationRestrictedStockActivityDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/StockBasedCompensationRestrictedStockNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/StockBasedCompensationRestrictedStockUnitsActivityDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/StockBasedCompensationStockOptionsNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/StockBasedCompensationStockOptionsOutstandingDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/StockBasedCompensationTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/StockBasedCompensationValuationAssumptionsDetails" xlink:type="extended" />
</link:linkbase>
