ETH unit converter
Convert any amount between wei, gwei and ETH, exact to the last wei.
- 100% free
- No sign-up
- Runs in your browser
Ether amounts
Type in any field and the others update.
Gas fee
Gas price × gas used. A plain ETH transfer uses 21,000 gas; token transfers and contract calls use more.
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How to use ETH unit converter
Type an amount
Enter a number in any unit: wei, gwei, ether or one of the others. Every other unit updates as you type.
Add a price
Enter the price of one ETH to see what the amount is worth in your currency.
Work out gas
Type a gas price in gwei and the gas used to see the transaction fee in ETH and in money.
Why use Utils365
Exact to the wei
Amounts are converted as whole numbers of wei, not floating-point numbers, so even 18 decimal places come out exactly right.
Every unit at once
Wei, kwei, mwei, gwei, szabo, finney and ether side by side. Type in any of them.
Gas fees
Gas price × gas used, in gwei, ETH and money. A plain ETH transfer uses 21,000 gas.
For developers
Copy exact values for smart contracts, scripts and wallets without counting zeros.
Frequently asked questions
How many wei are in one ETH?
1,000,000,000,000,000,000 wei, that is 10¹⁸. Wei is the smallest unit of ether, and every amount on Ethereum is stored as a whole number of wei.
What is gwei?
One billionth of an ETH, or 10⁹ wei. Gas prices are quoted in gwei because it keeps the numbers short.
How do I convert gwei to ETH?
Divide by 1,000,000,000. For example, 21,000 gwei is 0.000021 ETH. Type the gwei amount above and the ETH value appears.
How is a gas fee calculated?
Gas used × gas price. A transfer uses 21,000 gas; at 2 gwei it costs 42,000 gwei, which is 0.000042 ETH. Since EIP-1559 the price is the base fee plus a priority tip.
What are szabo and finney?
Older names for 10¹² and 10¹⁵ wei, after Nick Szabo and Hal Finney. Wallets rarely use them now, but they still appear in old contracts.
Does it work for other EVM chains?
Yes. Polygon, BNB Chain, Arbitrum and other EVM chains use the same 18-decimal units, so the conversion is the same.