Ethereum Unit Converter

Ethereum uses a decimal system of denominations where 1 Ether equals 10^18 Wei — the smallest indivisible unit. Between those extremes lie several named denominations: Kwei (10^3 Wei), Mwei (10^6), Gwei (10^9), Szabo (10^12), and Finney (10^15). Of these, Gwei is the most commonly used because gas prices on Ethereum are typically quoted in Gwei.

This converter takes any amount in one denomination and instantly shows the equivalent in all others. Developers working with smart contracts, wallets, and transaction builders need to convert between human-readable Ether amounts and the Wei values that the Ethereum Virtual Machine actually processes. Getting a decimal place wrong in this conversion can mean sending 1,000x too much or too little.

Why Gwei matters

When you submit a transaction on Ethereum, you specify a gas price in Gwei. A gas price of 30 Gwei means you are paying 30 × 10^9 Wei per unit of gas. Multiplied by the gas limit (typically 21,000 for a simple transfer), that yields the transaction fee in Wei, which this tool can then express in Ether for you. Understanding these conversions is essential for estimating and optimizing transaction costs.