Cross-chain · Ethereum → Base

Swap USDT from Ethereum to ETH on Base

Swap USDT from Ethereum to ETH on Base. A chain 8453 wallet that needs gas spends Ethereum Tether and receives native ETH on Base.

Native ETH on the destination is 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE, the gas coin Basescan shows for Base. It is not WETH at 0x4200000000000000000000000000000000000006, and it is not the ETH balance on Ethereum. You approve Tether at 0xdAC17F958D2ee523a2206206994597C13D831ec7 on Etherscan. If your Tether is already on Base, swap it for ETH there instead of opening this bridge. Chain id 1 still needs ETH to move the mainnet USDT. Blocks there are about 12 seconds. Switch to chain id 8453 and read the native line on Basescan after the route. Switch to chain id 8453 and read the native gas line on Basescan.

Diagram for Swap USDT from Ethereum to ETH on Base
USDT leaves Ethereum. ETH is what can arrive on Base.

Already on Base? Swap there

This route is the wrong tool when the USDT you hold is already on Base. Trade that token for ETH on chain 8453. Bridging from Ethereum moves 0xdAC17F958D2ee523a2206206994597C13D831ec7. Check which explorer holds the Tether before you sign.

The placeholder means Base ETH

Do not import 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE. On this path it means ETH on Base. On an Ethereum path it means ETH on chain id 1. After the route, switch to chain id 8453 and read the native line on Basescan.

ETH for the Tether approval

Chain id 1 charges ETH and blocks about every 12 seconds. Tether cannot substitute. Ethereum is where that signature happens. The ETH you receive on Base can pay the next transaction there. It cannot refund the mainnet fee.

Leave Base ETH for the follow-up

If you spend the entire Base ETH balance on the next transfer, later token moves stall. Keep a remainder sized for an approval and a swap. This pair funds that remainder from Ethereum Tether. It does not replace a dollar you still need on chain 8453.

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 Ethereum to ETH on Base?

Native ETH on the destination is 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE, the gas coin Basescan shows for Base. It is not WETH at 0x4200000000000000000000000000000000000006, and it is not the ETH balance on Ethereum.

Is 0xEeee an ETH contract I should import on Base?

It is a placeholder for the native gas coin, not a contract to import. On chain id 8453 that coin is ETH. Basescan shows it as the native balance. Importing the placeholder creates a useless row. Switch the wallet to Base and read the gas line. WETH is the separate predeploy.

What else belongs in the Ethereum wallet?

Tether plus ETH. The USDT contract at 0xdAC17F958D2ee523a2206206994597C13D831ec7 cannot pay gas on chain id 1, and blocks there are about 12 seconds. ETH you will receive on Base does not exist on Ethereum yet, so it cannot pay the fee either. Add a small ETH balance before you approve.

When is this the wrong tool?

When you want Ethereum Tether to become mainnet ETH, or when the Tether is already on Base. Those are local swaps. This bridge delivers native ETH on chain 8453 from mainnet USDT. Skip it if you wanted Base WETH or Base USDC instead of gas.

Live execution

Trade on XAUConnect

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.

Swap cross-chainExplore markets

Continue exploring

Related markets, guides & networks

Next pages on this subject. Read them before you trade.

Networks
Tokens
Guides
Articles

Build programmatically

Swap via API for bots and AI agents: quotes, builds, and cross-chain routes.

Developer quickstart