Ethereum Unit Converter | Wei to ETH, Gwei to ETH & Gas Fee Calculator

Ethereum unit converter turns wei, gwei, finney and ether into every other unit with exact BigInt math, plus a gas fee calculator for gwei to ETH and USD. Free, no signup.

Also known as: ethereum unit converter · wei to eth converter · gwei to eth · eth to wei · eth to gwei converter · wei to gwei · ethereum gas fee calculator · ethereum price live

unit converters

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converters

Amount Input

Amount

From unit

Accepts plain decimals, scientific notation and digit separators. Conversions use exact integer math on wei, so no precision is lost even for 18-decimal amounts.

Gas fee calculator

Gas limit (units)

Gas price (gwei)

ETH price (USD, optional)

A simple ETH transfer uses 21,000 gas. Token transfers are typically 45,000 to 65,000 and swaps 120,000 or more. Use the effective gas price (base fee plus priority fee) for EIP-1559 transactions.

Converted Values

Enter an amount, pick its unit and press Convert to see the value in wei, gwei, finney, ether and every unit in between.

Ethereum denominations

wei1 wei = 10^0 wei

kwei1 kwei = 10^3 wei

mwei1 mwei = 10^6 wei

gwei1 gwei = 10^9 wei (gas prices)

szabo1 szabo = 10^12 wei

finney1 finney = 10^15 wei

ether1 ether = 10^18 wei = 1 ETH

About Ethereum Unit Converter

Convert between wei, kwei, mwei, gwei, szabo, finney and ether with exact integer math, and estimate transaction gas fees in ETH and USD. Everything runs in your browser.

Key Features

Converts any amount into all seven Ethereum denominations at once using BigInt, so 18-decimal values never lose precision
Accepts scientific notation like 2.5e9 and rejects impossible fractions of a wei with a clear explanation
Built-in gas fee calculator: gas limit times gas price in gwei, shown in ETH, gwei, wei and optionally USD

Use Cases

Translate a wei value from an Etherscan transaction, RPC response or smart contract event into human-readable ETH
Set msg.value, gasPrice or maxFeePerGas correctly when writing ethers.js, viem, web3.js or Foundry scripts
Estimate what a transfer or contract call will cost at the current gwei gas price before signing it

Related Keywords

ethereum unit converter

wei to eth

gwei to eth

eth to wei

eth to gwei

wei to gwei

ethereum gas fee calculator

gwei converter

wei converter

Privacy & Security

All processing happens locally in your browser. Your data never leaves your computer, ensuring complete privacy and security.

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Frequently asked questions

What is Ethereum Unit Converter used for?

Ethereum unit converter turns wei, gwei, finney and ether into every other unit with exact BigInt math, plus a gas fee calculator for gwei to ETH and USD. Free, no signup.

Is Ethereum Unit Converter free to use?

Yes. Ethereum Unit Converter is completely free with no usage limits, and there is no paid tier required to use it.

Do I need an account to use Ethereum Unit Converter?

No. Ethereum Unit Converter works immediately in your browser with no signup, login, or email address required.

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