Wei / Gwei / Ether Converter
Convert between wei, gwei and ether — the units behind every Ethereum transaction and gas price.
Ethereum has no decimals internally — everything is integer wei (10⁻¹⁸ ETH). Gwei (10⁹ wei) is the convenient unit for gas prices because they're tiny fractions of ETH. A 30 gwei gas price is 0.00000003 ETH per unit of gas. Named after Wei Dai (b-money).
Formula
Note: This is a technical utility, not financial advice. Crypto assets are volatile and risky; do your own research and consult a licensed professional before making decisions.
About Wei / Gwei / Ether Converter
The wei/gwei/ether converter handles the three units that confuse every newcomer to Ethereum. Ether is what you hold; wei (10⁻¹⁸ ETH) is the indivisible base unit the blockchain actually counts in, since Ethereum stores no decimals; and gwei (10⁹ wei) is the practical unit for gas prices, which are tiny fractions of an ether. Enter an amount in any unit and see all three instantly. It's the everyday reference for reading gas prices, interpreting transaction values, debugging smart-contract amounts, and understanding the wallet figures that span 18 orders of magnitude.
How to use Wei / Gwei / Ether Converter
- 1Enter your values into Wei / Gwei / Ether Converter — sensible, domain-typical defaults are pre-filled so you see a real result immediately.
- 2The result recomputes live using the formula shown on the page; there is no button to press.
- 3Adjust any input to compare scenarios, then read the worked example to see the substituted numbers.
Why use Wei / Gwei / Ether Converter?
- ✓Computes Wei / Gwei / Ether Converter instantly in your browser — no sign-up, no upload, no server round-trip.
- ✓100% free and unlimited, with the exact formula shown: 1 ether = 10⁹ gwei = 10¹⁸ wei.
- ✓Runs entirely client-side, so every value you enter stays private on your device.
- ✓Live recompute as you type, with a worked example and authoritative references for trust.
Frequently asked questions
What is gwei and why are gas prices in gwei?+
Gwei (gigawei) is 10⁹ wei, or 0.000000001 ETH. Gas prices are quoted in gwei because the per-unit cost is a minuscule fraction of an ether — a '30 gwei' gas price is far more readable than '0.00000003 ETH'. It's purely a convenience unit; the network charges in wei underneath.
Why does Ethereum use wei instead of decimals?+
Computers handle integers exactly but floating-point decimals introduce rounding errors — unacceptable for money. So Ethereum counts everything in wei, the smallest indivisible unit (1 ETH = 10¹⁸ wei), keeping all balances and transfers as exact integers. Wallets divide by 10¹⁸ to show you friendly ether amounts, but the chain only knows wei.
How many wei are in one ether?+
Exactly 10¹⁸ (a quintillion) wei = 1 ether, and 10⁹ wei = 1 gwei, so 1 ether = 10⁹ gwei. These powers of ten make conversion just a matter of shifting the decimal: ether to gwei is ×10⁹, gwei to wei is ×10⁹ again. This tool does the shifts precisely across all 18 orders of magnitude.
What are wei and gwei named after?+
Wei is named after Wei Dai, the cryptographer who proposed 'b-money', an early precursor to cryptocurrency, in 1998. Gwei follows the metric 'giga' prefix (10⁹). Other denominations exist (kwei, mwei, szabo, finney) but wei, gwei and ether are the three you'll actually encounter in wallets, explorers and gas trackers.
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