Cross-chain · BNB Chain → Polygon

Swap BNB from BNB Chain to WETH on Polygon

Swap BNB from BNB Chain to WETH on Polygon. You send native BNB on BNB Chain and you receive WETH on Polygon, not POL.

The BNB side is 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE, the gas coin on chain id 56. No ERC-20 approval. BscScan shows the native send. Blocks are about 3 seconds. Leave BNB for the fee. Polygon WETH is 0x7ceB23fD6bC0adD59E62ac25578270cFf1b9f619. Match it on Polygonscan. It is not mainnet WETH and not the BNB Chain ETH peg. Chain id 137 still wants POL for every later move.

Diagram for Swap BNB from BNB Chain to WETH on Polygon — BNB leaves BNB Chain. WETH is what can arrive on Polygon.

Selling BNB, buying a Polygon wrapper

Native BNB is the input. The peg at 0x2170Ed0880ac9A755fd29B2688956BD959F933F8 is not. If your ether exposure on BNB Chain is only that peg, this page cannot see it. There is no approval for BNB, but the fee still comes out of BNB. Do not zero the balance and expect the swap to squeeze through.

The wrapper cannot pay Polygon

0x7ceB23fD6bC0adD59E62ac25578270cFf1b9f619 is an ERC-20. POL is the native coin. Polygonscan lists them apart. Receiving WETH does not give you POL, so a new wallet gets a token it cannot move. Mainnet WETH on Etherscan is a different address and will not update.

Open the POL page if you needed gas

This route is the wrong tool when the point was a spendable Polygon balance. USDC and USDT pages are the wrong tool when you wanted dollars. How bridges work covers the wait between BscScan and Polygonscan. It does not promise a WETH amount.

Minimum WETH, remainder BNB, POL waiting

Three numbers matter: the minimum WETH on the quote, the BNB you keep for chain id 56, and the POL already on chain id 137. A 3 second source block does not replace any of them. Sign only if the WETH floor is acceptable. If the quote expired, price it again. POL is not included in the WETH credit.

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 BNB from BNB Chain to WETH on Polygon?

The BNB side is 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE, the gas coin on chain id 56. No ERC-20 approval.

Will Polygon WETH show up as POL in the wallet?

No. POL is the gas coin. WETH is the token at 0x7ceB23fD6bC0adD59E62ac25578270cFf1b9f619 on Polygonscan. The BNB you sent was the marker 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE on BscScan. They stay different. You need POL already in the Polygon wallet if you want to transfer the WETH.

Is this the same WETH address Ethereum uses?

No. Ethereum WETH is a mainnet contract on Etherscan. This payout is 0x7ceB23fD6bC0adD59E62ac25578270cFf1b9f619 on chain id 137. Matching the ticker is not enough. You also need BNB left over for the source fee. There is no ERC-20 approval on the BNB itself.

What if the only ether I hold on BNB Chain is the peg?

This page will not spend it. The peg is 0x2170Ed0880ac9A755fd29B2688956BD959F933F8 and has its own route to Polygon WETH. You need native BNB here, both to sell and to pay gas. If BscScan shows dust BNB, the route cannot start. Open the peg page instead.

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-chain Explore 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