Cross-chain · Polygon → Arbitrum One

Swap WETH from Polygon to ARB on Arbitrum One

Swap WETH from Polygon to ARB on Arbitrum One moves WETH from Polygon to Arbitrum One, combining a bridge with any swaps needed on either side. XAUConnect bundles those steps into one workflow and shows the net amount received on Arbitrum One, the estimated transit time, and all fees before you sign on the source chain.

WETH: WETH is wrapped ETH — ETH packaged to follow the standard ERC-20 token interface so it can be traded in pools and used by contracts uniformly. It is fully backed one-to-one by ETH and freely convertible in both directions; functionally it is ETH with a token wrapper.

Both chains are EVM-compatible, but confirm the chain ID in your wallet before signing and check the WETH representation that arrives on Arbitrum One.

Why move WETH from Polygon to Arbitrum One?

Traders bridge WETH when the destination chain offers deeper liquidity, lower all-in cost, or access to assets and apps unavailable on the source. The right move depends on where you can actually execute and exit, which comes down to liquidity on Arbitrum One. Arbitrum concentrates deep liquidity for ETH, USDC, and the tokens of its native DeFi ecosystem, including its own governance and incentive assets. Major pairs trade with tight spreads, and the chain's DeFi focus means routing options are rich for blue-chip assets. Tokens bridged in from other layer-2s or sidechains may need an extra hop, so inspect the route when trading less central assets.

Leaving Polygon

Polygon is tightly connected to Ethereum, and a large part of its liquidity is bridged. When you bridge in, you typically receive a bridged representation; confirm its contract and decimals match what your destination app expects, and keep POL for gas on arrival. Native USDC on Polygon, where available, is generally the cleanest stablecoin to hold. Polygon gas is inexpensive but not zero; keep a small POL balance for approvals and the occasional failed-transaction retry. Because fees are low, frequent trading is practical, and as on other cheap chains the dominant real cost is usually price impact on thinner pools rather than the gas itself.

Arriving on Arbitrum One

Arbitrum connects to Ethereum through its canonical bridge and to other chains through third-party bridges. Withdrawals to Ethereum via the canonical path involve a delay by design; third-party routes are faster but carry their own risk. Keep ETH for gas on arrival, and confirm the destination token representation before trading it onward. Use any Arbitrum-configured EVM wallet — MetaMask, Rabby, Coinbase Wallet, or a WalletConnect app. Bridged ETH on Arbitrum is still ETH for gas purposes. Confirm the wallet is on Arbitrum One before signing, since the address is shared with every other EVM chain.

Execution timeline and status tracking

1. Connect your wallet on Polygon. 2. Approve WETH if prompted (EVM only). 3. Review the composite quote — bridge provider, minimum received on Arbitrum One, and estimated time. 4. Confirm and let the relayer work, typically a few minutes up to around fifteen. 5. Verify arrival on Arbiscan before considering the transfer complete. Do not submit a second transfer while the first is in transit unless the interface clearly reports failure — duplicate bridges are a common and costly mistake.

Handling WETH on both chains

What arrives on Arbitrum One may be a bridged or wrapped representation of WETH with its own contract address and possibly different decimals. Confirm it matches what your downstream app or pool expects before trading it onward. WETH carries essentially the same risk as ETH plus the trivial mechanics of wrapping; it is not a bridge asset and is always redeemable for ETH. Confirm you hold canonical WETH rather than a similarly-named wrapper on chains where multiple representations exist.

Address formats and destination checks

Both sides are EVM, so the hex address looks the same — and that is the trap. Confirm the wallet’s active chain ID is Arbitrum One after arrival, and that the WETH contract you see on Arbiscan is the one your next swap expects. Keep POL to pay for the source transaction and a little ETH on the destination so you are not stranded with tokens you cannot move.

First swap after WETH arrives on Arbitrum One

Arrival is not the end of the job. The token you receive may be wrapped or bridged WETH. Open Swap on Arbitrum One, paste the arriving contract, and convert into the native or deepest variant if you plan to trade further. Do not assume the ticker matches the pool you wanted. A typical WETH follow-up swap on Arbitrum One on Arbitrum One is cheap in ETH gas compared with Ethereum mainnet. On this network the number that usually dominates all-in cost is price impact in the pool, not the gas line — which is why comparing minimum received still matters even when fees look tiny.

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

How long does Polygon → Arbitrum One take?

Most configured routes finalize within a few minutes up to around fifteen, depending on the bridge provider, security checkpoints, and congestion on both networks. Track progress in the cross-chain step interface and verify arrival on Arbiscan.

Do I need gas on both chains?

Yes — POL on Polygon to initiate the bridge, and often ETH on Arbitrum One for any follow-up swap or transfer. Keep a small balance of each so you are never stranded with assets you cannot move.

What arrives on Arbitrum One?

Often a bridged or wrapped representation of WETH with its own contract and possibly different decimals. Confirm the arriving token matches what your destination app expects before trading it further.

Is cross-chain bridging risk-free?

No. Bridge contracts and relayers carry real risk on top of ordinary swap risk, and bridges have historically been targets of large exploits. Use established routes, verify amounts and addresses, and test unfamiliar routes with a small amount first.

Live execution