Cross-chain · Polygon → Ethereum

Swap USDC from Polygon to WETH on Ethereum

Swap USDC from Polygon to WETH on Ethereum. Circle USDC leaves Polygon. WETH is what can arrive on Ethereum. The wrapper is not gas, so a wallet with only that WETH still cannot pay chain id 1.

You sell 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359 and buy 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2. Native ETH would have been the label 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE. This page does not buy that label. Polygonscan shows the USDC. Etherscan shows WETH. The steps that keep a bridge from becoming a wrong wrap are in how to bridge assets between chains.

Diagram for Swap USDC from Polygon to WETH on Ethereum — USDC leaves Polygon. WETH is what can arrive on Ethereum.

WETH cannot start the next Ethereum transaction

0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2 is the wrapper. ETH is the gas coin. If the point of this hop was to fund gas on chain id 1, this route is wrong. Choose native ETH instead, then wrap only if a contract demands WETH.

Do not approve USDC.e by habit

Wallets often list USDC.e at 0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174 above native USDC. This quote wants 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359. An approval of the bridged contract does not sell the token named here. Read Polygonscan.

POL for the send, ETH for anything after

Chain id 137 takes POL. About 2 second blocks there are not the bridge clock. After WETH lands you still need a separate ETH balance on Ethereum, where blocks are about 12 seconds. This quote supplies neither the leftover POL nor that ETH.

Price exposure is real

USDC is Circle's dollar token. WETH tracks ether, not a dollar. The minimum on the quote is the floor. Refresh when it expires. If you needed DAI or Tether on Ethereum, you picked the wrong output.

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 USDC from Polygon to WETH on Ethereum?

You sell 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359 and buy 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2. Native ETH would have been the label 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE.

ETH and WETH are the same balance, right?

No. ETH is native gas. WETH is 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2. This route delivers the wrapper only. Etherscan can show WETH in the token list while the ETH line stays too low to send it. Keep ETH on chain id 1 if you must move the WETH. The wrapper cannot pay its own transfer.

Which USDC does Polygonscan need to show?

0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359, native Circle USDC on chain id 137. USDC.e at 0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174 is the wrong source. POL pays the fee. The destination contract is checked on Etherscan, not on Polygonscan. POL is only the source fee. Match the native contract on Polygonscan, not the bridged copy.

What if I only needed spendable gas on Ethereum?

Then skip this page. WETH does not pay gas. The native label 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE is the ETH route. Buying the wrapper and then unwrapping costs another transaction you may be unable to send without ETH already there. Fund ETH first or pick native ETH. Do that before you approve.

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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