Keccak-256 Hash
Compute Keccak-256 hashes and Solidity function selectors online. Free and 100% client-side; the hash used by Ethereum, computed in your browser.
EVM Unit Converter
Type a value in any field and the other denominations update instantly. All math is exact integer arithmetic (BigInt), with no floating-point rounding, even at 18 decimals.
Private by default: processing stays on your device
Example: gas cost
Input
21000 gas × 30 gwei = 630000 gwei
Output
0.00063 ether (630000000000000 wei)
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Frequently asked questions
What are wei, gwei and ether?
Wei is the smallest indivisible unit of ether: 1 ether = 10^18 wei. Gwei (gigawei) is 10^9 wei and is the standard unit for gas prices. Contract balances and msg.value are always denominated in wei on-chain.
Why not just multiply by 1e18 in JavaScript?
JavaScript numbers are 64-bit floats with only ~15-17 significant digits, so values like 1.000000000000000001 ether silently lose precision. This tool uses BigInt string math, so every digit is exact.
Does this work for other EVM chains?
Yes. Polygon, BNB Chain, Arbitrum, Optimism, Base and every other EVM-compatible chain use the same 18-decimal native unit system, so the conversions are identical.
Is my data sent anywhere?
No. The conversion is pure client-side arithmetic, so nothing you type ever leaves your browser.
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