Convert ether to wei instantly. Type in either field — results update live.
Selected ETH values converted to wei using the exact factor from this tool.
| ETH | wei |
|---|---|
| 0.01 | 10,000,000,000,000,000 |
| 0.1 | 100,000,000,000,000,000 |
| 1 | 1,000,000,000,000,000,000 |
| 2 | 2,000,000,000,000,000,000 |
| 3 | 3,000,000,000,000,000,000 |
| 5 | 5,000,000,000,000,000,000 |
| 10 | 10,000,000,000,000,000,000 |
| 20 | 20,000,000,000,000,000,000 |
| 50 | 50,000,000,000,000,000,000 |
| 100 | 100,000,000,000,000,000,000 |
| 1,000 | 1e+21 |
Exact conversion factors in both directions, plus a worked example.
1 ETH = 1e+18 wei
1 wei = 1e-18 ETH
To convert ether to wei, multiply by 1e+18.
To convert wei to ether, multiply by 1e-18.
Example: convert 10 ETH to wei
10 × 1e+18 = 1e+19 wei
Short background on the units used in this conversion.
Ether (ETH) is the base unit of the Ethereum network — one whole ETH on the ledger. Fixed denomination conversions only; not live prices or fiat values.
Whole ether appears in balances; gwei and wei are used for gas fees and smart-contract precision.
Wei is the smallest Ether denomination — 0.000000000000000001 ether (10⁻¹⁸ ETH). Fixed factor for on-chain integer math, not an exchange rate.
Smart contracts and balances store values in wei for full 18-decimal precision; 10¹⁸ wei always equals 1 ether.
wei = ETH × 1,000,000,000,000,000,000ETH = wei × 0.000000000000000001, using the same exact factors as this converter.