ETH Unit Converter
Convert between Wei, Gwei, and Ether instantly.
Base unit. 1 ETH = 10^18 Wei
Usually used for Gas. 1 Gwei = 10^9 Wei
Smallest unit. 1 Wei = 10^-18 ETH
What is an ETH Unit Converter?
The ETH Unit Converter is a developer utility for translating values between the various denominations of Ether (Ethereum's native currency). While 1 Ether is the standard trading unit, the blockchain itself operates on 'Wei'βthe smallest possible unit.
Ethereum uses an 18-decimal system. This means 1 Ether = 1,000,000,000,000,000,000 Wei (10^18). Handling numbers this large manually leads to frequent errors, which can be catastrophic in smart contract development.
The three most common units are: Ether (for general value), Gwei (Giga-wei, 10^9 Wei) used almost exclusively for Gas prices, and Wei (10^0) used in solidity code. A user might pay '0.01 ETH', but the code sees '10000000000000000 Wei'. This tool provides a safe sandwich layer to convert between them instantly without moving decimal points in your head.
1How to Use
- Enter a value in any box (e.g., type '1' in the Ether box).
- The tool instantly calculates the Gwei and Wei equivalents.
- Copy the resulting value (e.g., for use in Remix or Metamask).
- Try entering a Gas price (e.g., '50' Gwei) to see its Wei cost.
β Key Features
- Bi-Directional Sync: Updating any field (Wei, Gwei, ETH) automatically updates the others.
- BigInt Precision: Uses JavaScript BigInt to handle 18+ digit numbers without scientific notation errors.
- Gas Price Ready: Quickly convert Gwei gas prices to ETH cost.
- Smart Contract Safe: Generates exact Wei strings perfect for pasting into Solidity constructor arguments.