To bridge ETH to Base, move your ETH from Ethereum mainnet to the Base network using either the official Base bridge or a faster third-party bridge such as Across, then confirm the transaction in your wallet. The official bridge is the most trusted route. A third-party bridge is usually faster and cheaper for everyday transfers.
Key takeaways
- Use the official Base bridge for large amounts or maximum trust. Deposits take a few minutes; withdrawals back to Ethereum take about seven days.
- Use a third-party bridge like Across for speed and lower cost on everyday transfers. These settle in seconds to minutes.
- If you hold ETH on Coinbase, you can often withdraw straight to Base and skip bridging.
- You pay Ethereum gas either way. The ETH you bridge becomes your gas balance on Base.
What you need before you start
- An Ethereum wallet such as MetaMask or Rabby, holding the ETH you want to move plus a little extra ETH for gas.
- A few minutes. Most deposits finish quickly.
- You do not have to add Base to your wallet by hand. Most bridges add the network for you when the transfer completes.
The fastest way: use a third-party bridge
For most people moving an everyday amount, a third-party bridge is the better choice. An intent bridge like Across quotes a price, fills your transfer from its own liquidity, and settles in minutes rather than waiting on Ethereum finality. You also skip the long withdrawal window that the official bridge applies in the other direction.
If you are not sure which bridge gives the best price, an aggregator like Jumper compares several bridges at once and routes you through the strongest quote. Base has deep bridge support, so quotes are usually competitive.
Step by step: bridge ETH to Base
- Fund and connect your wallet. Open a bridge and connect an Ethereum wallet that holds the ETH you want to move plus a little extra ETH for gas.
- Set the route to Base. Choose Ethereum as the source chain and Base as the destination, then select ETH as the token.
- Enter the amount and review the quote. Type the amount, then read the quoted fee, the estimated time, and the exact amount of ETH you will receive on Base.
- Confirm and sign. Approve the transaction in your wallet and wait for the bridge to confirm.
- Verify the balance on Base. Switch your wallet to the Base network and confirm the ETH balance shows before you close the tab.
Using the official Base bridge
The official Base bridge is the canonical route, run by the team behind the network. Deposits from Ethereum to Base are quick, usually a few minutes. It charges no protocol fee, so your only cost is Ethereum gas.
The catch is the other direction. Withdrawing ETH from Base back to Ethereum on the official bridge takes about seven days because of a challenge period built into the network’s security model. If you need to exit fast, a third-party bridge can do it in minutes for a fee, which is why many people keep a fast bridge on hand.
The Coinbase shortcut
Base was incubated by Coinbase, so the exchange has tight integration with the network. If your ETH is already on Coinbase, check whether you can withdraw it directly to Base. When that option is available, it is the simplest path of all because you never touch a bridge. If your exchange only supports Ethereum mainnet, withdraw to your wallet first, then bridge.
How much does it cost?
| Route | Protocol fee | You also pay | Best for |
|---|---|---|---|
| Official Base bridge | None | Ethereum gas | Large amounts, maximum trust |
| Third-party bridge (e.g. Across) | Small bridge fee | Ethereum gas | Speed, everyday transfers |
| Coinbase direct withdrawal | Exchange fee | None on-chain to you | Funds already on Coinbase |
For small transfers, Ethereum gas often dominates the total cost. For larger transfers, the spread on a third-party route matters more, so compare the amount received, not the headline fee.
How long does it take?
Depositing to Base is fast on every route, from a few seconds on an intent bridge to a few minutes on the official bridge. The slow case is withdrawing back to Ethereum on the official bridge, which takes roughly seven days. A third-party bridge avoids that wait in exchange for a fee.
Is it safe?
Bridging always carries some risk, so the route you pick matters. The official Base bridge is among the most trusted because the network team maintains it. Third-party bridges add speed and lower cost but carry the security model of that specific protocol, so prefer ones with real audit history and time in production.
Three habits cut most of the risk:
- Confirm you are on the correct bridge URL before connecting a wallet.
- Start with a small test transfer on any route you have not used before.
- Read the quoted route and the bridge it uses before you sign.
Common mistakes to avoid
- Picking the wrong network on a withdrawal. Select Base explicitly, not Ethereum mainnet, when an exchange or bridge asks.
- Bridging your last bit of ETH. Keep a small amount on both chains so you can pay gas on each side.
- Forgetting the withdrawal delay. The official bridge’s seven-day exit window surprises people. Plan around it or use a fast bridge to leave.
- Trusting a link from a search ad or a DM. Type the address or use a saved bookmark.
Which bridge should you use?
If you want a safe default that finds a good route automatically, start with Jumper. For fast, cheap movement between Ethereum and its L2s, Across is hard to beat. If you also move stablecoins across many chains, Stargate is worth a look. To compare them side by side, see our list of the best cross-chain routers.
