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Handy Browser Tools

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
YOUR VALUE

Type in any unit, the rest convert

Exact ETH math.

Any field converts the other two with exact decimal arithmetic.

Unit reference

1 ether

= 1,000,000,000 gwei = 1,000,000,000,000,000,000 wei

1 gwei

= 1,000,000,000 wei = 0.000000001 ether

1 wei

smallest unit = 10⁻¹⁸ ether

Good to know

Conversions use exact decimal arithmetic — no floating-point rounding, even for dust amounts. Gwei is the usual unit for gas prices.

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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