How to use Satoshi / Gwei / Wei Converter
Switch between BTC↔Satoshi and ETH↔Gwei↔Wei tabs. Edit any field and the linked units update for gas quotes, invoices, and UTXO math. Everything stays on your device.
Example: satoshis, gwei and wei
You see a Bitcoin fee of 2,800 sats and an Ethereum gas price of 25 gwei and want them in familiar units.
- 2,800 sats ÷ 100,000,000 = 0.000028 BTC
- 25 gwei = 25 × 10⁻⁹ ETH = 0.000000025 ETH
- A 21,000-gas transfer at 25 gwei = 21,000 × 25 × 10⁻⁹ = 0.000525 ETH
1 BTC = 100,000,000 sats and 1 ETH = 10⁹ gwei = 10¹⁸ wei. One wrong zero is a 10× error, so convert before you sign.
Formula & methodology
1 BTC = 100,000,000 sats. 1 ETH = 1e9 gwei = 1e18 wei. Conversions are exact rational scalings, limited only by JavaScript number precision on extremely large wei strings.
Convert satoshi, gwei, and wei fast
Bitcoin invoices and Lightning amounts often use satoshis. Ethereum wallets and explorers bounce between ETH, gwei, and wei. One wrong zero is expensive. This unit converter translates human units and chain-native units while you draft a transaction.
Gas trackers quote gwei. Smart-contract ABIs expect wei. Accounting sheets prefer ETH. Live-linked fields let you paste a gas oracle number and see the ETH cost of a 21,000-gas transfer, or scale a contract value from wei into something readable.
Because the math never leaves the browser, it works offline after the page loads. Pair it with the gas tracker before you mint or bridge, and with the wallet validator before you paste a destination address.
All CryptonicTools utilities are free, mobile-first, and require no account.