Cross-chain · Arbitrum One → Ethereum

Swap WETH from Arbitrum One to ETH on Ethereum

Swap WETH from Arbitrum One to ETH on Ethereum. Arbitrum WETH leaves the wallet and native ETH arrives on Ethereum.

You sell the ERC-20 at 0x82aF49447D8a07e3bd95BD0d56f35241523fBab1, not the gas coin. Check that WETH on Arbiscan. Arbitrum One is chain id 42161, not Nova. You still pay the fee in native ETH. The output marker is 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE, which on Ethereum means the real gas balance, not WETH at 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2. Etherscan shows the account, not a token supply, for that sentinel. Chain id 1 blocks take about 12 seconds and do not clock the bridge.

Diagram for Swap WETH from Arbitrum One to ETH on Ethereum
WETH leaves Arbitrum One. ETH is what can arrive on Ethereum.

Unwrap on Arbitrum would never reach mainnet

Calling withdraw on 0x82aF49447D8a07e3bd95BD0d56f35241523fBab1 returns native ETH on Arbitrum One. You stay on chain id 42161. This route is for people who want the gas coin on Ethereum instead. The receive marker is the same sentinel text, 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE, but the chain id is 1, so the balance that can rise is mainnet ETH. Context is the chain, not the hex alone.

Why the fee and the sale are different rows

You need native ETH on Arbitrum One to pay gas even though you are selling WETH. If you unwrapped everything already, you no longer hold the contract this page spends. If you have not unwrapped, you need a leftover gas balance beside the WETH. Emptying the gas row to zero, then trying to approve WETH, fails. Nova's ETH does not fill this gap on chain id 42161.

What a successful credit looks like

You should not be hunting an ERC-20 transfer for the received ETH. The Ethereum account balance changes. Etherscan's internal transactions or the balance delta are the clues, depending on how the route delivers. You will not receive 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2. If a dapp wanted that WETH, you would still have to wrap on mainnet, and wrapping spends a slice of the ETH you just received as gas.

Wrong page for wrapped output or for USDC

Stay off this route if the destination contract must be WETH, Circle USDC, Tether, or Maker DAI. The output is native ETH only. Stay off it if you merely wanted to unwrap inside Arbitrum One. How cross-chain bridges work is the background for why unwrapping and bridging are separate jobs even when both end with something called ETH.

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 WETH from Arbitrum One to ETH on Ethereum?

You sell the ERC-20 at 0x82aF49447D8a07e3bd95BD0d56f35241523fBab1, not the gas coin. Check that WETH on Arbiscan.

Does this deliver Ethereum WETH or native ETH?

Native ETH. The output marker is 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE on chain id 1. Canonical WETH is 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2 and is not the credit. You spend Arbitrum WETH at 0x82aF49447D8a07e3bd95BD0d56f35241523fBab1. If a pool only accepts the WETH contract, wrap after arrival and keep gas for that wrap. Confirm the address on the explorer before you sign.

Can I unwrap WETH on Arbitrum and call it done?

Only if you wanted ETH on Arbitrum One. Withdraw on 0x82aF49447D8a07e3bd95BD0d56f35241523fBab1 pays native ETH on chain id 42161. It does not create a balance on Ethereum. This page is the one that can credit mainnet ETH. Check the network in the wallet before you decide which action you are signing.

Why does the sentinel appear on both sides?

0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE is a marker for native gas, not a unique token. On Arbitrum One it means the ETH you use for fees. On Ethereum it means the ETH you can receive. The sold token is still the WETH contract on Arbiscan. Read the chain id beside the marker. Nova is neither of these two networks.

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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