diff --git a/packages/arb-token-bridge-ui/src/hooks/useTransferDuration.ts b/packages/arb-token-bridge-ui/src/hooks/useTransferDuration.ts
index f8671e23e2..ceb92a04c5 100644
--- a/packages/arb-token-bridge-ui/src/hooks/useTransferDuration.ts
+++ b/packages/arb-token-bridge-ui/src/hooks/useTransferDuration.ts
@@ -3,12 +3,7 @@ import { isValidTeleportChainPair } from '@/token-bridge-sdk/teleport'
 
 import { MergedTransaction } from '../state/app/state'
 import { useRemainingTimeCctp } from '../state/cctpState'
-import {
-  getBlockNumberReferenceChainIdByChainId,
-  getConfirmPeriodBlocks,
-  getL1BlockTime,
-  isNetwork
-} from '../util/networks'
+import { isNetwork } from '../util/networks'
 import { getConfirmationTime } from '../util/WithdrawalUtils'
 
 const DEPOSIT_TIME_MINUTES = {
@@ -31,13 +26,6 @@ const DEPOSIT_TIME_MINUTES_ORBIT = {
   testnet: 1
 }
 
-/**
- * Buffer for after a node is confirmable but isn't yet confirmed.
- * A rollup block (RBlock) typically gets asserted every 30-60 minutes.
- */
-const CONFIRMATION_BUFFER_MINUTES = 60
-const SECONDS_IN_MIN = 60
-
 type UseTransferDurationResult = {
   approximateDurationInMinutes: number
   estimatedMinutesLeft: number | null
@@ -122,22 +110,10 @@ export function getWithdrawalConfirmationDate({
   // For new txs createdAt won't be defined yet, we default to the current time in that case
   const createdAtDate = createdAt ? dayjs(createdAt) : dayjs()
 
-  const { confirmationTimeInSeconds, fastWithdrawalActive } =
-    getConfirmationTime(withdrawalFromChainId)
-  if (fastWithdrawalActive && confirmationTimeInSeconds) {
-    return createdAtDate.add(confirmationTimeInSeconds, 'second')
-  }
-
-  const blockNumberReferenceChainId = getBlockNumberReferenceChainIdByChainId({
-    chainId: withdrawalFromChainId
-  })
-  // the block time is always base chain's block time regardless of withdrawing from L3 to L2 or from L2 to L1
-  // and similarly, the confirm period blocks is always the number of blocks on the base chain
-  const confirmationSeconds =
-    getL1BlockTime(blockNumberReferenceChainId) *
-      getConfirmPeriodBlocks(withdrawalFromChainId) +
-    CONFIRMATION_BUFFER_MINUTES * SECONDS_IN_MIN
-  return createdAtDate.add(confirmationSeconds, 'second')
+  const { confirmationTimeInSeconds } = getConfirmationTime(
+    withdrawalFromChainId
+  )
+  return createdAtDate.add(confirmationTimeInSeconds, 'second')
 }
 
 function getWithdrawalDuration(tx: MergedTransaction) {
diff --git a/packages/arb-token-bridge-ui/src/util/WithdrawalUtils.ts b/packages/arb-token-bridge-ui/src/util/WithdrawalUtils.ts
index ac29f2c02c..7d14ef12e6 100644
--- a/packages/arb-token-bridge-ui/src/util/WithdrawalUtils.ts
+++ b/packages/arb-token-bridge-ui/src/util/WithdrawalUtils.ts
@@ -10,8 +10,11 @@ import { GasEstimates } from '../hooks/arbTokenBridge.types'
 import { Address } from './AddressUtils'
 import { captureSentryErrorWithExtraData } from './SentryUtils'
 import { getBridgeUiConfigForChain } from './bridgeUiConfig'
-import { isNetwork } from './networks'
-
+import {
+  getBlockNumberReferenceChainIdByChainId,
+  getConfirmPeriodBlocks,
+  getL1BlockTime
+} from './networks'
 export async function withdrawInitTxEstimateGas({
   amount,
   address,
@@ -111,22 +114,26 @@ export async function withdrawInitTxEstimateGas({
 const SECONDS_IN_MINUTE = 60
 const SECONDS_IN_HOUR = 3600
 const SECONDS_IN_DAY = 86400
-const DEFAULT_CONFIRMATION_TIME = 7 * SECONDS_IN_DAY
-const DEFAULT_TESTNET_CONFIRMATION_TIME = SECONDS_IN_HOUR
+/**
+ * Buffer for after a node is confirmable but isn't yet confirmed.
+ * A rollup block (RBlock) typically gets asserted every 30-60 minutes.
+ */
+const CONFIRMATION_BUFFER_MINUTES = 60
 
 function formatDuration(seconds: number, short = false): string {
   if (seconds < SECONDS_IN_MINUTE) {
-    return `${seconds} ${short ? 'secs' : 'seconds'}`
+    return `${seconds} ${short ? 'secs' : seconds === 1 ? 'second' : 'seconds'}`
   }
   if (seconds < SECONDS_IN_HOUR) {
-    return `${Math.round(seconds / SECONDS_IN_MINUTE)} ${
-      short ? 'mins' : 'minutes'
-    }`
+    const minutes = Math.round(seconds / SECONDS_IN_MINUTE)
+    return `${minutes} ${short ? 'mins' : minutes === 1 ? 'minute' : 'minutes'}`
   }
   if (seconds < SECONDS_IN_DAY) {
-    return `${Math.round(seconds / SECONDS_IN_HOUR)} hours`
+    const hours = Math.round(seconds / SECONDS_IN_HOUR)
+    return `${hours} ${hours === 1 ? 'hour' : 'hours'}`
   }
-  return `${Math.round(seconds / SECONDS_IN_DAY)} days`
+  const days = Math.round(seconds / SECONDS_IN_DAY)
+  return `${days} ${days === 1 ? 'day' : 'days'}`
 }
 
 /**
@@ -135,7 +142,6 @@ function formatDuration(seconds: number, short = false): string {
  */
 export function getConfirmationTime(chainId: number) {
   const { fastWithdrawalTime } = getBridgeUiConfigForChain(chainId)
-  const isTestnet = isNetwork(chainId).isTestnet
 
   const fastWithdrawalActive = typeof fastWithdrawalTime !== 'undefined'
 
@@ -144,9 +150,16 @@ export function getConfirmationTime(chainId: number) {
   if (fastWithdrawalActive) {
     confirmationTimeInSeconds = fastWithdrawalTime / 1000
   } else {
-    confirmationTimeInSeconds = isTestnet
-      ? DEFAULT_TESTNET_CONFIRMATION_TIME
-      : DEFAULT_CONFIRMATION_TIME
+    // Calculate confirmation period using block time from root chain:
+    // - Ethereum mainnet for Arbitrum chains
+    // - Parent chain for Base chains
+    const blockNumberReferenceChainId = getBlockNumberReferenceChainIdByChainId(
+      { chainId }
+    )
+    confirmationTimeInSeconds =
+      getL1BlockTime(blockNumberReferenceChainId) *
+        getConfirmPeriodBlocks(chainId) +
+      CONFIRMATION_BUFFER_MINUTES * SECONDS_IN_MINUTE
   }
 
   const confirmationTimeInReadableFormat = formatDuration(