Ethereum Developer Toolkit
Free browser-based utilities for Ethereum and Solidity developers. Convert units, hash with Keccak256, compute function selectors, encode ABI calldata, and validate addresses. Everything runs in your browser — no data is sent to any server.
ETH Unit Converter
Convert between Wei, Gwei, Finney, and Ether with full BigInt precision — no floating point errors.
wei
1000000000000000000
kwei
1000000000000000
mwei
1000000000000
gwei
1000000000
microether
1000000
milliether
1000
ether
1
1 Ether = 1018 Wei = 109 Gwei
1 Gwei = 109 Wei
1 Finney = 1015 Wei (milliether)