Cross-chain · Arbitrum One → Base

Swap USDT from Arbitrum One to USDC on Base

Swap USDT from Arbitrum One to USDC on Base. Tether USDT leaves Arbitrum One and Circle USDC arrives on Base.

Sell Tether at 0xFd086bC7CD5C481DCC9C85ebE478A1C0b69FCbb9. Arbiscan, chain id 42161, not Nova. Gas in ETH. Receive Circle USDC at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base, six decimals. Basescan is the check. It is not USDbC, the older bridged dollar, and it is not Arbitrum USDC. Base is chain id 8453, an L2. Blocks about every 2 seconds. That clock is not a credit promise.

Diagram for Swap USDT from Arbitrum One to USDC on Base — USDT leaves Arbitrum One. USDC is what can arrive on Base.

Native USDC, not the bridged USDbC

Base had a bridged dollar before Circle's native contract. Apps that never migrated still want USDbC. This route names 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 only. If your pool points at the bridged token, the Circle balance will not count. Read the pool's token on Basescan. Both are often labeled USDC. The address is the difference between a successful deposit and a token the app ignores.

Tether out, Circle in

The issuer changes. Six decimals on both make the fee look small, and it can still be real. Read the minimum. Do not assume a desk that redeems Tether will redeem this USDC, or the reverse. Arbitrum Tether is not Base USDC with a new coat of paint. Base is chain id 8453, not Ethereum, so Etherscan is the wrong explorer for the receive.

ETH on both L2s, for different reasons

You need ETH on Arbitrum One to move USDT. You need ETH on Base later to move USDC. This output is not the gas sentinel, so the second balance is not included. Two rollups, two fee tanks. Nova is not a third name for either of them.

Wrong if you wanted Tether to remain

This page does not deliver a USDT contract on Base. It does not deliver USDbC. It does not deliver native ETH or the WETH predeploy. It is wrong if your source token is not 0xFd086bC7CD5C481DCC9C85ebE478A1C0b69FCbb9, and wrong if you wanted Circle USDC to stay on Arbitrum at 0xaf88d065e77c8cC2239327C5EDb3A432268e5831.

Legal

Risk disclosure

XAUConnect is a non-custodial swap aggregator. Digital assets are volatile and may lose value rapidly. Content on this page is educational and not investment advice. Verify every contract address on the official block explorer before approving a transaction.

Frequently asked questions

What is the best way to swap USDT from Arbitrum One to USDC on Base?

Sell Tether at 0xFd086bC7CD5C481DCC9C85ebE478A1C0b69FCbb9. Arbiscan, chain id 42161, not Nova. XAUConnect compares live routes and lets your own wallet sign.

Is Base USDC the same as USDbC?

No. This route can credit Circle's native USDC at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913. USDbC is the older bridged token and a different contract. Check Basescan, chain id 8453. You spend Tether at 0xFd086bC7CD5C481DCC9C85ebE478A1C0b69FCbb9 on Arbitrum One. If your app still wants the bridged dollar, this arrival will not match.

Do both stablecoins use six decimals?

Yes. Arbitrum USDT and Base Circle USDC are both six decimals, so whole-token amounts are comparable. They are still different issuers. Read the minimum rather than assuming one-for-one. About 2 seconds is a Base block interval, not a price lock. You need ETH on chain id 42161 to start.

Will this USDC pay gas on Base?

No. Base is an L2 that charges native ETH, sentinel 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE. USDC is an ERC-20. This route does not deliver the gas coin. Hold Base ETH before you transfer 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913. Arbitrum ETH will not cover that Base fee. Confirm that address on the explorer before you sign, and refresh the quote if it has expired.

Live execution

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Open the swap page with this cross-chain route pre-selected, then connect your wallet on the source chain to quote and execute. You keep the keys.

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