Ethereum Unit Converter
Convert between Wei, Gwei, ETH and other Ethereum denominations instantly. Exact integer-safe BigInt math, live all-units table, 100% in-browser.
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What is Ethereum Unit Converter?
The Ethereum Unit Converter converts any amount between wei, Kwei, Mwei, Gwei, microether (szabo), milliether (finney), ether and kiloether. Conversions run on BigInt integer arithmetic, so results stay exact even at 18-decimal precision — ideal for gas pricing, smart contract work, and wallet calculations.
Key Benefits
- Exact integer-safe results with no floating-point rounding
- All eight standard Ethereum denominations in one live table
- Swap direction instantly when checking prices both ways
- Handles huge gas totals and tiny fractional amounts alike
- Runs entirely offline — safe for private transactions and audits
Common Use Cases
- •Price smart contract operations in Gwei from an ETH budget
- •Check how much wei a quoted ETH amount represents
- •Reconcile transaction fees from block explorers against wallets
- •Teach or document the Ethereum denomination system
- •Verify token math during dApp development and code review
How to Convert Ethereum Units
- Enter amount: Type or paste the amount you want to convert. Commas are ignored and up to 18 decimal places are supported.
- Choose units: Pick the source unit (for example ETH) and the target unit (for example Gwei) from the dropdowns.
- Review result: The exact converted value updates live, along with a table showing the amount in every denomination.
- Copy or swap: Copy the result to your clipboard, or press the swap button to reverse the direction.
Key Features
- Convert Wei, Kwei, Mwei, Gwei, Szabo, Finney, ETH and kETH
- Exact BigInt integer math with zero floating-point rounding
- Live conversion table showing every denomination at once
- Accepts comma-separated amounts and up to 18 decimal places
- One-click swap between source and target units
- Copy results instantly — runs fully offline in your browser
Frequently Asked Questions
What are the Ethereum denominations?
Ethereum units are powers of 10 of wei: 1 Kwei = 10^3 wei, 1 Mwei = 10^6 wei, 1 Gwei = 10^9 wei, 1 microether (szabo) = 10^12 wei, 1 milliether (finney) = 10^15 wei, and 1 ether = 10^18 wei. A kiloether is 10^21 wei.
Why use this converter instead of a regular calculator?
Floating-point calculators silently round numbers beyond roughly 15 significant digits. This tool converts through BigInt integers, so a value like 123456789012345678 wei becomes exactly 0.123456789012345678 ETH with no precision loss.
What is Gwei used for?
Gwei (1 Gwei = 0.000000001 ETH) is the standard unit for Ethereum gas prices. When a wallet quotes a gas price of 20 Gwei, that means 0.00000002 ETH per unit of gas consumed.
Does my data leave the browser?
No. All parsing and conversion run locally with JavaScript BigInt. Nothing you type is uploaded, stored, or logged.