<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2025 Workiva-->
<!--r:b39239fd-74b7-43d8-b2c0-8e2d869ecb00,g:23e60a38-6af5-470f-9009-b7caf7c8b912-->
<link:linkbase 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" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.up.com/role/CondensedConsolidatedStatementsofIncomeUnaudited" xlink:type="simple" xlink:href="unp-20250630.xsd#CondensedConsolidatedStatementsofIncomeUnaudited"/>
  <link:calculationLink xlink:role="http://www.up.com/role/CondensedConsolidatedStatementsofIncomeUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_40b7a4fa-d4a1-4689-8724-aef65ca3b23c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_388393f0-72b4-43a6-b2a8-64047f8439d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_40b7a4fa-d4a1-4689-8724-aef65ca3b23c" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_388393f0-72b4-43a6-b2a8-64047f8439d7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_5e3119f2-1aea-4f25-86a6-01dc671cb906" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostsAndExpenses"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_40b7a4fa-d4a1-4689-8724-aef65ca3b23c" xlink:to="loc_us-gaap_CostsAndExpenses_5e3119f2-1aea-4f25-86a6-01dc671cb906" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_a541d732-aa2a-47b2-a504-6864a9c36e1e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseNonoperating_1eeb9629-ea86-4057-8029-02d4fc6b7b06" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseNonoperating"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_a541d732-aa2a-47b2-a504-6864a9c36e1e" xlink:to="loc_us-gaap_InterestExpenseNonoperating_1eeb9629-ea86-4057-8029-02d4fc6b7b06" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_2b59c476-4e0a-4d3e-ae38-108c264d7ce1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_a541d732-aa2a-47b2-a504-6864a9c36e1e" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_2b59c476-4e0a-4d3e-ae38-108c264d7ce1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_583d2f77-cf4c-4873-a07d-b976b6c40728" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_a541d732-aa2a-47b2-a504-6864a9c36e1e" xlink:to="loc_us-gaap_OperatingIncomeLoss_583d2f77-cf4c-4873-a07d-b976b6c40728" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_150d4bbc-06a2-446d-b848-e0d8fa0a2264" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostsAndExpenses"/>
    <link:loc xlink:type="locator" xlink:label="loc_unp_PurchasedServicesAndMaterial_a10065a0-7fd4-46c9-a80b-994caae46f80" xlink:href="unp-20250630.xsd#unp_PurchasedServicesAndMaterial"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_150d4bbc-06a2-446d-b848-e0d8fa0a2264" xlink:to="loc_unp_PurchasedServicesAndMaterial_a10065a0-7fd4-46c9-a80b-994caae46f80" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LaborAndRelatedExpense_d5c151eb-14ef-4ff5-a147-87c48ff93c23" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LaborAndRelatedExpense"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_150d4bbc-06a2-446d-b848-e0d8fa0a2264" xlink:to="loc_us-gaap_LaborAndRelatedExpense_d5c151eb-14ef-4ff5-a147-87c48ff93c23" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCostAndExpenseOperating_a8801ea1-22ad-4748-a93e-f2d2fbe1918a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCostAndExpenseOperating"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_150d4bbc-06a2-446d-b848-e0d8fa0a2264" xlink:to="loc_us-gaap_OtherCostAndExpenseOperating_a8801ea1-22ad-4748-a93e-f2d2fbe1918a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_unp_EquipmentAndOtherRents_8507c2c8-463f-46e9-b499-ebb5ca7636cc" xlink:href="unp-20250630.xsd#unp_EquipmentAndOtherRents"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_150d4bbc-06a2-446d-b848-e0d8fa0a2264" xlink:to="loc_unp_EquipmentAndOtherRents_8507c2c8-463f-46e9-b499-ebb5ca7636cc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Depreciation_cfe9efdf-d6f6-474a-9b7a-432aba408507" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Depreciation"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_150d4bbc-06a2-446d-b848-e0d8fa0a2264" xlink:to="loc_us-gaap_Depreciation_cfe9efdf-d6f6-474a-9b7a-432aba408507" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FuelCosts_8c46919a-9d74-41c8-9d31-f403b1a64ec7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FuelCosts"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_150d4bbc-06a2-446d-b848-e0d8fa0a2264" xlink:to="loc_us-gaap_FuelCosts_8c46919a-9d74-41c8-9d31-f403b1a64ec7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_20b72eaa-00b7-40c2-9b48-2d8149f4ba2f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_d885c1f9-d450-4591-950e-0097c96acbbc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_20b72eaa-00b7-40c2-9b48-2d8149f4ba2f" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_d885c1f9-d450-4591-950e-0097c96acbbc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_c2faab68-eaa0-466c-a65b-e986009011b2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_20b72eaa-00b7-40c2-9b48-2d8149f4ba2f" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_c2faab68-eaa0-466c-a65b-e986009011b2" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.up.com/role/CondensedConsolidatedStatementsofComprehensiveIncomeUnaudited" xlink:type="simple" xlink:href="unp-20250630.xsd#CondensedConsolidatedStatementsofComprehensiveIncomeUnaudited"/>
  <link:calculationLink xlink:role="http://www.up.com/role/CondensedConsolidatedStatementsofComprehensiveIncomeUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_128cab16-4992-485a-ba65-5e6c306fd0fe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_86bc336b-87af-4b6b-825f-b3c1f28a763c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_128cab16-4992-485a-ba65-5e6c306fd0fe" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_86bc336b-87af-4b6b-825f-b3c1f28a763c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_04480cb0-7037-4980-9687-71c11701b5ec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_128cab16-4992-485a-ba65-5e6c306fd0fe" xlink:to="loc_us-gaap_NetIncomeLoss_04480cb0-7037-4980-9687-71c11701b5ec" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_b7711faf-ccdd-4ebb-9ab3-d8e6cbd63dfb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent_f750948c-7aba-4f01-87ac-37977a49be7b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_b7711faf-ccdd-4ebb-9ab3-d8e6cbd63dfb" xlink:to="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent_f750948c-7aba-4f01-87ac-37977a49be7b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_b5beeb36-c71c-4785-a9e7-f40622f09c70" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_b7711faf-ccdd-4ebb-9ab3-d8e6cbd63dfb" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_b5beeb36-c71c-4785-a9e7-f40622f09c70" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent_3cd80ddf-dcdd-45a1-afd4-651a99cfcb7b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_b7711faf-ccdd-4ebb-9ab3-d8e6cbd63dfb" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent_3cd80ddf-dcdd-45a1-afd4-651a99cfcb7b" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.up.com/role/CondensedConsolidatedStatementsofFinancialPositionUnaudited" xlink:type="simple" xlink:href="unp-20250630.xsd#CondensedConsolidatedStatementsofFinancialPositionUnaudited"/>
  <link:calculationLink xlink:role="http://www.up.com/role/CondensedConsolidatedStatementsofFinancialPositionUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_cbf903cd-c242-4f85-82bc-8dad6ff521a2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_2aa52f1a-1a23-4c62-9fc5-44ce083ac0fa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_cbf903cd-c242-4f85-82bc-8dad6ff521a2" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_2aa52f1a-1a23-4c62-9fc5-44ce083ac0fa" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_8df952bf-8602-4373-811b-295585dddee6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_cbf903cd-c242-4f85-82bc-8dad6ff521a2" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_8df952bf-8602-4373-811b-295585dddee6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_8816bc4a-af3d-4df0-8cda-b2939b6f83e7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_cbf903cd-c242-4f85-82bc-8dad6ff521a2" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_8816bc4a-af3d-4df0-8cda-b2939b6f83e7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_9913a477-646d-41db-a6d3-9fbac8d5ebca" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_cbf903cd-c242-4f85-82bc-8dad6ff521a2" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_9913a477-646d-41db-a6d3-9fbac8d5ebca" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_93967668-73da-44ce-8795-11258fbf28ac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_cbf903cd-c242-4f85-82bc-8dad6ff521a2" xlink:to="loc_us-gaap_LiabilitiesCurrent_93967668-73da-44ce-8795-11258fbf28ac" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_dad80b6a-34a7-4379-8eba-7791203b88ca" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_8f3c258c-5760-4e54-bea5-24dc5d2588ef" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_dad80b6a-34a7-4379-8eba-7791203b88ca" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_8f3c258c-5760-4e54-bea5-24dc5d2588ef" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_0713f5ca-3503-46b9-bf2d-f62f7ae800c6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_dad80b6a-34a7-4379-8eba-7791203b88ca" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_0713f5ca-3503-46b9-bf2d-f62f7ae800c6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsCurrent_2a0ffc78-7de7-4baf-8563-77f1e4c4bd33" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_dad80b6a-34a7-4379-8eba-7791203b88ca" xlink:to="loc_us-gaap_OtherAssetsCurrent_2a0ffc78-7de7-4baf-8563-77f1e4c4bd33" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MaterialsSuppliesAndOther_1ef0d586-ba11-4ea9-b170-4d0d06758527" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MaterialsSuppliesAndOther"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_dad80b6a-34a7-4379-8eba-7791203b88ca" xlink:to="loc_us-gaap_MaterialsSuppliesAndOther_1ef0d586-ba11-4ea9-b170-4d0d06758527" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_0d7156d6-3a31-416a-8954-835179ce2cdc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_4b33fea1-e396-474a-b574-460d4dbf121b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_0d7156d6-3a31-416a-8954-835179ce2cdc" xlink:to="loc_us-gaap_StockholdersEquity_4b33fea1-e396-474a-b574-460d4dbf121b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_dac67014-05f5-4093-8848-9767b8e6b5f8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_0d7156d6-3a31-416a-8954-835179ce2cdc" xlink:to="loc_us-gaap_Liabilities_dac67014-05f5-4093-8848-9767b8e6b5f8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_df02ad13-aafa-4c79-9d76-fc5875ac58e9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_0d7156d6-3a31-416a-8954-835179ce2cdc" xlink:to="loc_us-gaap_CommitmentsAndContingencies_df02ad13-aafa-4c79-9d76-fc5875ac58e9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_be948a69-ed77-47b7-b3b8-5f68426d7045" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_aa49c127-0f22-4e32-b158-7a1b841a0b16" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_be948a69-ed77-47b7-b3b8-5f68426d7045" xlink:to="loc_us-gaap_AssetsCurrent_aa49c127-0f22-4e32-b158-7a1b841a0b16" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_720a3d34-1c38-4292-b082-9858ad0e19f3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_be948a69-ed77-47b7-b3b8-5f68426d7045" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_720a3d34-1c38-4292-b082-9858ad0e19f3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_e62edc5c-90e8-4704-9e29-380f2d6139b9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_be948a69-ed77-47b7-b3b8-5f68426d7045" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_e62edc5c-90e8-4704-9e29-380f2d6139b9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_e7f0c311-6fed-4dee-bfd8-6c8d2da9c6f5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_be948a69-ed77-47b7-b3b8-5f68426d7045" xlink:to="loc_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_e7f0c311-6fed-4dee-bfd8-6c8d2da9c6f5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_ec61f5dc-c1fb-4c7d-b4c7-a46779bd0a36" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_be948a69-ed77-47b7-b3b8-5f68426d7045" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_ec61f5dc-c1fb-4c7d-b4c7-a46779bd0a36" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_014c183b-c649-44fe-bfd0-7080672098cd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_8b8429c3-3079-40f9-90fa-1a52fbf090b1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_014c183b-c649-44fe-bfd0-7080672098cd" xlink:to="loc_us-gaap_CommonStockValue_8b8429c3-3079-40f9-90fa-1a52fbf090b1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_015df686-89d9-4596-b9ed-8ee086bc09fb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_014c183b-c649-44fe-bfd0-7080672098cd" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_015df686-89d9-4596-b9ed-8ee086bc09fb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValue_9c469bb0-f5d2-4b2c-b873-15a301a79938" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockValue"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_014c183b-c649-44fe-bfd0-7080672098cd" xlink:to="loc_us-gaap_TreasuryStockValue_9c469bb0-f5d2-4b2c-b873-15a301a79938" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_81ead2e0-bc1a-4364-9123-74a015fe8c79" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_014c183b-c649-44fe-bfd0-7080672098cd" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_81ead2e0-bc1a-4364-9123-74a015fe8c79" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_980faff8-b9f1-4cf9-9a9e-ca683bb8123b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_014c183b-c649-44fe-bfd0-7080672098cd" xlink:to="loc_us-gaap_AdditionalPaidInCapital_980faff8-b9f1-4cf9-9a9e-ca683bb8123b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_601fd2ad-9244-4e18-b093-982081e412ad" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_eb190ad9-a86a-4214-8891-b885c3a0cc70" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_601fd2ad-9244-4e18-b093-982081e412ad" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_eb190ad9-a86a-4214-8891-b885c3a0cc70" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_6b39c778-c86d-4747-b699-4b602bca203e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_601fd2ad-9244-4e18-b093-982081e412ad" xlink:to="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_6b39c778-c86d-4747-b699-4b602bca203e" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.up.com/role/CondensedConsolidatedStatementsofCashFlowsUnaudited" xlink:type="simple" xlink:href="unp-20250630.xsd#CondensedConsolidatedStatementsofCashFlowsUnaudited"/>
  <link:calculationLink xlink:role="http://www.up.com/role/CondensedConsolidatedStatementsofCashFlowsUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_efc21fac-eb5c-4c07-8654-a821dbe3c12c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_ed9cb2df-5b52-42ac-8594-24e6e9515c38" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_efc21fac-eb5c-4c07-8654-a821dbe3c12c" xlink:to="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_ed9cb2df-5b52-42ac-8594-24e6e9515c38" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_8b78e644-5c0e-45eb-ad93-6e6ef15abd66" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_efc21fac-eb5c-4c07-8654-a821dbe3c12c" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_8b78e644-5c0e-45eb-ad93-6e6ef15abd66" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_737380d7-d02a-4e14-b28d-f2e8ed2f2246" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherCurrentAssets_3551263d-5576-409e-999d-429ad3ecd87b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherCurrentAssets"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_737380d7-d02a-4e14-b28d-f2e8ed2f2246" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherCurrentAssets_3551263d-5576-409e-999d-429ad3ecd87b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInMaterialsAndSupplies_6967528d-9b9d-4a54-b6c1-e35d551f650a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInMaterialsAndSupplies"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_737380d7-d02a-4e14-b28d-f2e8ed2f2246" xlink:to="loc_us-gaap_IncreaseDecreaseInMaterialsAndSupplies_6967528d-9b9d-4a54-b6c1-e35d551f650a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_10eaecc6-fc25-421a-91f1-6f8c1f9407b5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_737380d7-d02a-4e14-b28d-f2e8ed2f2246" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_10eaecc6-fc25-421a-91f1-6f8c1f9407b5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_b1a29f60-fb7f-4fb3-9a29-af41b1dc068e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_737380d7-d02a-4e14-b28d-f2e8ed2f2246" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_b1a29f60-fb7f-4fb3-9a29-af41b1dc068e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_b4cef6fa-92cd-4c2b-9bbd-73c27b5f7629" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredIncomeTaxesAndTaxCredits"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_737380d7-d02a-4e14-b28d-f2e8ed2f2246" xlink:to="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_b4cef6fa-92cd-4c2b-9bbd-73c27b5f7629" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Depreciation_83cc97cb-6172-4776-ae33-a4d7ddca4a53" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Depreciation"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_737380d7-d02a-4e14-b28d-f2e8ed2f2246" xlink:to="loc_us-gaap_Depreciation_83cc97cb-6172-4776-ae33-a4d7ddca4a53" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedTaxesPayable_1d43d79d-a66f-449c-806a-1798813a46ae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccruedTaxesPayable"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_737380d7-d02a-4e14-b28d-f2e8ed2f2246" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedTaxesPayable_1d43d79d-a66f-449c-806a-1798813a46ae" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_aed21c4f-f984-4ef1-8845-47bd6ba29bd7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_737380d7-d02a-4e14-b28d-f2e8ed2f2246" xlink:to="loc_us-gaap_NetIncomeLoss_aed21c4f-f984-4ef1-8845-47bd6ba29bd7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_89665f04-39f2-4cd7-8f05-ce52be93caf5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_737380d7-d02a-4e14-b28d-f2e8ed2f2246" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_89665f04-39f2-4cd7-8f05-ce52be93caf5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_92dc9992-7929-46e9-ba3d-f53a4c5776b3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_f302b7a5-ed0a-4669-985a-d578ba7a8b0e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_92dc9992-7929-46e9-ba3d-f53a4c5776b3" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_f302b7a5-ed0a-4669-985a-d578ba7a8b0e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_52185602-8eda-46f9-824a-21c32784c4e0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_92dc9992-7929-46e9-ba3d-f53a4c5776b3" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_52185602-8eda-46f9-824a-21c32784c4e0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_cb3cc6e2-8479-4a90-8965-091e1af7a241" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_92dc9992-7929-46e9-ba3d-f53a4c5776b3" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_cb3cc6e2-8479-4a90-8965-091e1af7a241" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_c4ccd232-5fe0-43c5-91c4-5103978a3066" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_f802a449-d94c-4fd5-9f09-eec053373438" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_c4ccd232-5fe0-43c5-91c4-5103978a3066" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_f802a449-d94c-4fd5-9f09-eec053373438" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_e313609b-a31e-4b0d-9427-688a7d97a1c5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_c4ccd232-5fe0-43c5-91c4-5103978a3066" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_e313609b-a31e-4b0d-9427-688a7d97a1c5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDividends_ac855140-0ae1-47c0-866d-4c019f206a49" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfDividends"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_c4ccd232-5fe0-43c5-91c4-5103978a3066" xlink:to="loc_us-gaap_PaymentsOfDividends_ac855140-0ae1-47c0-866d-4c019f206a49" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations_c26c27c8-bf96-429c-8a8a-a52ac3e8a581" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_c4ccd232-5fe0-43c5-91c4-5103978a3066" xlink:to="loc_us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations_c26c27c8-bf96-429c-8a8a-a52ac3e8a581" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommercialPaper_bff5c1c8-9486-4b32-9242-56089b66603f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOfCommercialPaper"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_c4ccd232-5fe0-43c5-91c4-5103978a3066" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfCommercialPaper_bff5c1c8-9486-4b32-9242-56089b66603f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_6453825d-cf1b-4aa9-b983-f0df182b1e4a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromPaymentsForOtherFinancingActivities"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_c4ccd232-5fe0-43c5-91c4-5103978a3066" xlink:to="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_6453825d-cf1b-4aa9-b983-f0df182b1e4a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_560f1697-1df7-4eac-81b1-89bea564146b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsNoncurrent_d06b2ad5-c784-4e8c-8a87-76b488c20682" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashAndCashEquivalentsNoncurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_560f1697-1df7-4eac-81b1-89bea564146b" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsNoncurrent_d06b2ad5-c784-4e8c-8a87-76b488c20682" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_1410bc2f-59b6-43c0-8ede-ea85860d24a3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_560f1697-1df7-4eac-81b1-89bea564146b" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_1410bc2f-59b6-43c0-8ede-ea85860d24a3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_297306dd-a2a7-4ea9-958f-ba796e0ac828" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_560f1697-1df7-4eac-81b1-89bea564146b" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_297306dd-a2a7-4ea9-958f-ba796e0ac828" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.up.com/role/RetirementPlansScheduleofNetPeriodicPensionBenefitCostDetails" xlink:type="simple" xlink:href="unp-20250630.xsd#RetirementPlansScheduleofNetPeriodicPensionBenefitCostDetails"/>
  <link:calculationLink xlink:role="http://www.up.com/role/RetirementPlansScheduleofNetPeriodicPensionBenefitCostDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_98c6f0a1-b1e5-4566-9006-63bb667b87d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_222a1be2-7d8d-46ab-b250-3fd43c4c8970" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_98c6f0a1-b1e5-4566-9006-63bb667b87d0" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_222a1be2-7d8d-46ab-b250-3fd43c4c8970" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_cbdfd9c9-9c46-42a0-b50e-5282263a25f9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_98c6f0a1-b1e5-4566-9006-63bb667b87d0" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_cbdfd9c9-9c46-42a0-b50e-5282263a25f9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_3b9df746-01ea-44aa-85d8-89afeb9dd01e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DefinedBenefitPlanInterestCost"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_98c6f0a1-b1e5-4566-9006-63bb667b87d0" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_3b9df746-01ea-44aa-85d8-89afeb9dd01e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_5d00b963-d360-4e8c-82fb-03ea94035539" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DefinedBenefitPlanServiceCost"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_98c6f0a1-b1e5-4566-9006-63bb667b87d0" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_5d00b963-d360-4e8c-82fb-03ea94035539" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.up.com/role/OtherIncomeDetails" xlink:type="simple" xlink:href="unp-20250630.xsd#OtherIncomeDetails"/>
  <link:calculationLink xlink:role="http://www.up.com/role/OtherIncomeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_a61a5404-55b9-44fb-930c-b4af38744d4e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLossFromRealEstateOperations_d09cdb1f-8614-4cf6-8b9d-ac9a6b1512db" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProfitLossFromRealEstateOperations"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherNonoperatingIncomeExpense_a61a5404-55b9-44fb-930c-b4af38744d4e" xlink:to="loc_us-gaap_ProfitLossFromRealEstateOperations_d09cdb1f-8614-4cf6-8b9d-ac9a6b1512db" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent_47922605-c362-4130-8890-01bfcff6ab3d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherNonoperatingIncomeExpense_a61a5404-55b9-44fb-930c-b4af38744d4e" xlink:to="loc_us-gaap_NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent_47922605-c362-4130-8890-01bfcff6ab3d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_unp_EnvironmentalRemediationAndRestoration_fa5f1d74-0605-415e-86ac-4d67e9f61db5" xlink:href="unp-20250630.xsd#unp_EnvironmentalRemediationAndRestoration"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherNonoperatingIncomeExpense_a61a5404-55b9-44fb-930c-b4af38744d4e" xlink:to="loc_unp_EnvironmentalRemediationAndRestoration_fa5f1d74-0605-415e-86ac-4d67e9f61db5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_unp_InterestFromFederalRefundClaims_0249f4c1-5e54-48d3-b06d-db3d0ed3f0a5" xlink:href="unp-20250630.xsd#unp_InterestFromFederalRefundClaims"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherNonoperatingIncomeExpense_a61a5404-55b9-44fb-930c-b4af38744d4e" xlink:to="loc_unp_InterestFromFederalRefundClaims_0249f4c1-5e54-48d3-b06d-db3d0ed3f0a5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_unp_OtherNonoperatingIncomeExpenseOther_61824ec7-de1e-4868-9460-cde62c5c7ba1" xlink:href="unp-20250630.xsd#unp_OtherNonoperatingIncomeExpenseOther"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherNonoperatingIncomeExpense_a61a5404-55b9-44fb-930c-b4af38744d4e" xlink:to="loc_unp_OtherNonoperatingIncomeExpenseOther_61824ec7-de1e-4868-9460-cde62c5c7ba1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeOther_5b6f065d-7dce-41c3-bb0f-108b3fe326f6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeOther"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherNonoperatingIncomeExpense_a61a5404-55b9-44fb-930c-b4af38744d4e" xlink:to="loc_us-gaap_InterestIncomeOther_5b6f065d-7dce-41c3-bb0f-108b3fe326f6" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.up.com/role/EarningsPerShareDetails" xlink:type="simple" xlink:href="unp-20250630.xsd#EarningsPerShareDetails"/>
  <link:calculationLink xlink:role="http://www.up.com/role/EarningsPerShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_1ef6eb31-431e-4d34-a4d9-5c10803ddb3b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_0838df51-fc98-409b-8a09-d6a562c16d15" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_1ef6eb31-431e-4d34-a4d9-5c10803ddb3b" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_0838df51-fc98-409b-8a09-d6a562c16d15" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_ff28cd26-9075-431e-9a6f-087f464ce938" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_1ef6eb31-431e-4d34-a4d9-5c10803ddb3b" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_ff28cd26-9075-431e-9a6f-087f464ce938" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.up.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" xlink:type="simple" xlink:href="unp-20250630.xsd#AccumulatedOtherComprehensiveIncomeLossDetails"/>
  <link:calculationLink xlink:role="http://www.up.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_3b7b1cb8-61d8-4d9d-9e7c-dec1f76ae303" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent_dbc38eb9-2515-4d74-bcd5-c0e8997bae16" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_3b7b1cb8-61d8-4d9d-9e7c-dec1f76ae303" xlink:to="loc_us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent_dbc38eb9-2515-4d74-bcd5-c0e8997bae16" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent_6322138a-28ed-4381-b355-843e29ed1e1e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_3b7b1cb8-61d8-4d9d-9e7c-dec1f76ae303" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent_6322138a-28ed-4381-b355-843e29ed1e1e" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.up.com/role/PropertiesDetails" xlink:type="simple" xlink:href="unp-20250630.xsd#PropertiesDetails"/>
  <link:calculationLink xlink:role="http://www.up.com/role/PropertiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_a2264def-976d-479b-b4b2-198e8b9212e7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_d943bd93-8b6e-4b90-8f44-835e6fe343a8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_a2264def-976d-479b-b4b2-198e8b9212e7" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_d943bd93-8b6e-4b90-8f44-835e6fe343a8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_23f79a21-bbcd-4d29-b16f-f5628e6bafa4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_a2264def-976d-479b-b4b2-198e8b9212e7" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_23f79a21-bbcd-4d29-b16f-f5628e6bafa4" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.up.com/role/AccountsPayableandOtherCurrentLiabilitiesDetails" xlink:type="simple" xlink:href="unp-20250630.xsd#AccountsPayableandOtherCurrentLiabilitiesDetails"/>
  <link:calculationLink xlink:role="http://www.up.com/role/AccountsPayableandOtherCurrentLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_cdd66caf-cd45-4fb6-8d81-742cc4dd8823" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedEmployeeBenefitsCurrent_3a16fda7-153e-4640-bd2c-5175992b2789" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedEmployeeBenefitsCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_cdd66caf-cd45-4fb6-8d81-742cc4dd8823" xlink:to="loc_us-gaap_AccruedEmployeeBenefitsCurrent_3a16fda7-153e-4640-bd2c-5175992b2789" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPayableCurrent_5457af45-11cf-4f0c-9ab1-f45607f70f45" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestPayableCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_cdd66caf-cd45-4fb6-8d81-742cc4dd8823" xlink:to="loc_us-gaap_InterestPayableCurrent_5457af45-11cf-4f0c-9ab1-f45607f70f45" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_3571b03b-2c29-41a5-8316-a5677419a3fe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_cdd66caf-cd45-4fb6-8d81-742cc4dd8823" xlink:to="loc_us-gaap_AccountsPayableCurrent_3571b03b-2c29-41a5-8316-a5677419a3fe" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxesPayableCurrent_b3525ee9-d052-4cf3-a65d-3dd9cc054dc7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TaxesPayableCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_cdd66caf-cd45-4fb6-8d81-742cc4dd8823" xlink:to="loc_us-gaap_TaxesPayableCurrent_b3525ee9-d052-4cf3-a65d-3dd9cc054dc7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedRentCurrent_e4ba0ded-e1ef-409d-a1fb-b84f8ee908e5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedRentCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_cdd66caf-cd45-4fb6-8d81-742cc4dd8823" xlink:to="loc_us-gaap_AccruedRentCurrent_e4ba0ded-e1ef-409d-a1fb-b84f8ee908e5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrent_1e8d45bb-0902-43e4-bbd6-2788c714cc41" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAccruedLiabilitiesCurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_cdd66caf-cd45-4fb6-8d81-742cc4dd8823" xlink:to="loc_us-gaap_OtherAccruedLiabilitiesCurrent_1e8d45bb-0902-43e4-bbd6-2788c714cc41" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_f2c5c11c-c651-44c5-97ea-4c8458cd88ac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_cdd66caf-cd45-4fb6-8d81-742cc4dd8823" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_f2c5c11c-c651-44c5-97ea-4c8458cd88ac" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyAccrualCarryingValueCurrent_96873017-e610-4765-8e26-9088770b32c0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingencyAccrualCarryingValueCurrent"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_cdd66caf-cd45-4fb6-8d81-742cc4dd8823" xlink:to="loc_us-gaap_LossContingencyAccrualCarryingValueCurrent_96873017-e610-4765-8e26-9088770b32c0" xlink:type="arc"/>
  </link:calculationLink>
</link:linkbase>
