Trading Ethereum on Exchanges: Networks, Gas, Fees and ETH vs WETH
Trading Ethereum on an exchange is easy; moving ETH in and out is where most costly mistakes happen. ETH now lives on Ethereum mainnet and on many layer-2 networks that use the same 0x addresses, so the network you pick on a deposit or withdrawal screen matters as much as the address. This guide covers what to check before depositing ETH to an exchange, how Ethereum gas and exchange withdrawal fees work, the difference between ETH and wrapped ETH (WETH), and how to read the ETH order book before you trade. It's educational and contains no price predictions.
Educational content, not financial advice. ETH's price can fall sharply, and exchange features and fees vary by platform and country.
One address, several networks
An Ethereum address is 0x followed by 40 hexadecimal characters, and the same address format is used on Ethereum mainnet and on EVM-compatible layer-2 networks. ethereum.org describes layer 2s as networks that extend Ethereum, with rollups posting their data back to mainnet. In practice, an exchange's ETH deposit screen often lists several networks: Ethereum (ERC20) plus one or more layer 2s.
- The address can be identical across those networks, so a wallet won't stop you from choosing the wrong one.
- The balances are separate. ETH sent on a layer 2 only arrives if the exchange supports deposits on that network. If it doesn't, recovery is at the exchange's discretion, and may not be possible.
- Pick the network on both sides: the one your wallet sends on must match the one selected on the exchange's deposit screen.
Our guide to deposit address and network selection has a full checklist, and it applies to every coin, not only ETH.
What gas is, and who pays it
Every Ethereum transaction pays gas, in ETH. ethereum.org gives the standard example: a simple ETH transfer uses 21,000 units of gas, and the fee is those units multiplied by the base fee plus a priority fee (the tip). The base fee is set by the protocol and burned; the tip goes to the validator. Token transfers use more gas than a plain ETH transfer.
- Depositing to an exchange: you pay the gas from your wallet, so keep a little extra ETH beyond the amount you're sending.
- Withdrawing from an exchange: the exchange charges its own withdrawal fee, usually fixed per network and shown on the withdrawal screen. It's often lower on a layer 2.
- Busy times cost more. The base fee rises when blocks are full, which is why the same transfer can cost different amounts on different days.
For a plain-language comparison across networks, see crypto network fees and gas explained.
ETH vs WETH
Wrapped ether is a token that represents ETH one-for-one. ethereum.org explains that you deposit ETH into the WETH contract and receive the same amount of WETH, an ERC-20 token, and can redeem WETH for ETH at any time, at which point the WETH is burned. Apps that only handle ERC-20 tokens use WETH for that reason.
- On a centralized exchange, the ETH you trade is usually just a balance; you rarely touch WETH.
- In your own wallet, ETH and WETH appear as two different assets. Only ETH pays gas.
- Before depositing WETH to an exchange, check the exchange accepts WETH on that network. Many list only ETH.
Reading the ETH market before you trade
ETH pairs are among the most liquid on most exchanges, but liquidity still varies by pair and time of day. Before a market order, look at the spread between the best bid and ask and at how much size sits near the top of the book. A thin book means a large market order fills at worse prices as it walks through the levels. Our beginner's guide to reading an order book explains the terms. A limit order lets you set the price you're willing to pay, at the cost of possibly not filling. For choosing between ETH/EUR, ETH/USDC and ETH/BTC and how market, limit and stop orders behave, see ETH trading pairs and order types; for how ether differs from bitcoin on supply, block times and fees, see Bitcoin vs Ethereum for traders.
Withdrawing ETH safely
- Choose the network your wallet will receive on. If your wallet is set to Ethereum mainnet, withdraw on Ethereum; if you want a layer 2, make sure the wallet shows that network.
- Paste and check the address. Compare the first and last characters, and beware of address poisoning: lookalike addresses planted in your history. See withdrawal address book poisoning.
- Use the withdrawal allowlist if the exchange offers one, and add your own addresses in advance.
- Send a small test first when you use a new address or network.
- Moving between networks later needs a bridge; ethereum.org's bridges page explains what they do and the extra risks they add.
Common ETH deposit problems and what they usually mean
- "Pending" in my wallet for a long time: the fee offered may be below what blocks currently need. Many wallets let you speed up the transaction by resubmitting it with a higher fee.
- Confirmed on the explorer but not credited: the exchange may need more confirmations than you've reached yet, or you sent on a network it doesn't watch. Check the transaction's network on a block explorer and compare it with the exchange's deposit page.
- Sent from a smart contract wallet: some exchanges don't credit ETH sent through a contract call automatically. Their help pages say whether they support it; if not, contact support through the logged-in account.
- Deposited a token the exchange doesn't list: the exchange may not credit it at all. Check the list of supported tokens and networks before sending anything unfamiliar.
In every case, keep the transaction hash. It's the one piece of evidence the exchange's support team needs, and real support will never ask for your recovery phrase to "find" a deposit.
Risks to keep in view
- Price risk: ETH can lose a large part of its value quickly. Size positions so a fall doesn't force you to sell.
- Platform risk: coins on an exchange are held by the exchange. Use one that is properly authorised; see choosing a secure trading platform.
- Network mistakes: sending on a network the other side doesn't support is the most common avoidable loss.
- Fake tokens: tokens named "ETH" exist on many chains. Check you're receiving the native coin or the official wrapped version.
FAQ
Why do I need ETH to send ETH or tokens?
Every transaction on Ethereum pays its gas fee in ETH. If you send your whole balance, keep a little back for the fee; if you send tokens, you need ETH in the same wallet to pay for the transfer.
What happens if I deposit ETH on the wrong network?
If the exchange doesn't support that network for deposits, the ETH won't be credited automatically. Some exchanges can recover it for a fee, others can't. Always match the network on both screens.
Is WETH the same as ETH?
It's worth the same, because the WETH contract redeems it one-for-one for ETH. But it's a separate ERC-20 token: only ETH pays gas, and not every exchange accepts WETH deposits.
Are ETH withdrawal fees cheaper on layer 2?
Often, because layer-2 transactions usually cost less than mainnet ones. Each exchange sets its own fee per network, so compare the figures on the withdrawal screen.
Sources
- ethereum.org: Gas and fees (checked 2026-11-02)
- ethereum.org: Layer 2 networks (checked 2026-11-02)
- ethereum.org: Wrapped ether (WETH) (checked 2026-11-02)
- ethereum.org: Blockchain bridges (checked 2026-11-02)
Educational content, not financial, legal or tax advice. Crypto-assets are volatile and you can lose the full amount you put in. Exchange features, fees and rules differ by venue and country and change over time; confirm details on official pages. Last verified 2026-11-02.