WETH and ETH are worth exactly the same: the WETH9 contract issues one WETH for each ETH deposited and pays one ETH back for each WETH returned. What differs is the job: ETH is the native coin that pays gas, WETH is the same value in ERC-20 form so smart contracts can move it. The rule that follows: keep ETH, and wrap only the amount a contract asks for, when it asks.
- Same value: CoinGecko quoted WETH at 0.99978 ETH on October 11, 2026, a gap of 0.02% that arbitrage keeps closing, because WETH9 always redeems at 1:1.
- Sending costs differ: a WETH transfer took about 34,853 gas on Ethereum mainnet on October 11, 2026 (Ethereum RPC), against a fixed 21,000 gas for an ETH transfer, 1.66 times as much.
- A small share is wrapped: 2,173,369 WETH in WETH9 against 122.12 million ETH in circulation (CoinGecko) means about 1.78% of all ETH sat in the mainnet WETH contract on October 11, 2026.
- Two balances, one address: a wallet shows ETH and WETH separately on every network, and only the ETH balance can pay fees.
WETH vs ETH in One Table
The table compares the two on the properties that decide which one an action needs. Figures are from October 11, 2026.
| Parameter | ETH | WETH |
|---|---|---|
| What it is | Native coin of Ethereum and its L2s | ERC-20 token issued by WETH9 for deposited ETH |
| Pays network fees | Yes | No |
| Can be pulled by a contract (approve / transferFrom) | No | Yes |
| Gas for a plain transfer | 21,000 | about 34,853 |
| Value | 1 ETH | 1 ETH, redeemable at WETH9 |
| Market quote (CoinGecko) | 1 | 0.99978 ETH |
| Supply on Ethereum | 122.12 million | 2,173,369 |
Data source: Ethereum RPC (eth_estimateGas, totalSupply()) and CoinGecko, October 11, 2026. The short version of this comparison sits on the home page: ETH vs WETH.
Which One Each Action Needs
Most everyday actions need ETH; WETH is needed only where a contract pulls funds from you. Modern apps often hide the difference by wrapping or unwrapping inside the same transaction.
| Action | Needs | Why |
|---|---|---|
| Pay network fees | ETH | Fees are always paid in the native coin |
| Send to another wallet | Either; ETH is cheaper | 21,000 gas for ETH, about 34,853 for WETH |
| Swap on a DEX | Either | Routers wrap ETH or unwrap WETH inside the swap |
| Supply to a lending protocol | WETH (often wrapped for you) | Lending pools hold ERC-20 tokens |
| Place an NFT offer | WETH | Offers are signed off-chain and settled with transferFrom() |
| Deposit to an exchange | ETH | Many exchanges credit only native ETH |
Two cases cause most mistakes: sending WETH to an exchange that credits only ETH, and holding only WETH with no ETH left for fees (WETH and gas).
Does ETH Work Where WETH Is Required
No. A contract that expects WETH calls transferFrom() on the WETH9 contract, and native ETH has no such function, so the call cannot take ETH from your address. That is the whole reason WETH exists: ETH was created before the ERC-20 standard and does not implement it (why WETH exists).
What looks like “ETH working as WETH” is an app wrapping for you. A DEX interface that accepts ETH as input sends it to deposit() first; a lending protocol’s ETH entry point wraps it before the deposit. The contract underneath still receives WETH.
Why WETH Can Trade Slightly Off 1 ETH
WETH can trade a fraction away from 1 ETH on a single venue because pools on DEXs set their own prices from their balances. The gap does not last: if WETH trades below 1 ETH, anyone can buy it and unwrap it for a full ETH; if it trades above, anyone can wrap ETH and sell the WETH. On October 11, 2026 CoinGecko’s aggregate quote was 0.99978 ETH, a 0.02% difference.
What It Costs to Switch Between ETH and WETH
Switching costs one network fee and nothing else, because WETH9 charges no fee of its own. On September 29, 2026 a wrap cost $0.08-$0.37 on Ethereum mainnet and under $0.01 on Arbitrum and Base; an unwrap is the same kind of single call. Gem Wallet, for example, wraps and unwraps between ETH and WETH inside the app, so the result is the same deposit() or withdraw() without leaving the wallet. Step-by-step: ETH to WETH, WETH to ETH.
When to Keep ETH and When to Hold WETH
- Keep ETH: for fees, for sending to people and exchanges, and as the default balance of a wallet.
- Hold WETH: while it is supplied to a lending pool, provided as liquidity, or reserved for NFT offers.
- Wrap just in time: most apps wrap in the same transaction, so a separate wrap is needed only when an app asks for WETH you do not have.
- Check the network: ETH and WETH on Base, Arbitrum and Ethereum are separate balances; the WETH contract address differs on each.