Gwei ↔ ETH ↔ Wei Converter
Convert Gwei to ETH and Wei (and back) with exact precision. No rounding errors. Fast, accessible, and private.
1 ETH = 1,000,000,000 Gwei = 1,000,000,000,000,000,000 Wei
1 Gwei = 0.000000001 ETH = 1,000,000,000 Wei
1 Wei = 0.000000000000000001 ETH = 0.000000001 Gwei
How it works
This tool provides accurate calculations and conversions for your daily needs. Simply enter your values and get instant results.
Our algorithms ensure precision and reliability, making complex calculations simple and accessible to everyone.
Formula
Frequently Asked Questions
How it works
This converter uses BigInt arithmetic to ensure exact precision when converting between Ethereum units. Unlike floating-point calculations that can introduce rounding errors, our converter maintains perfect accuracy for all conversions.
Unit Relationships
- ETH (Ether): The native cryptocurrency of Ethereum. 1 ETH = 1,000,000,000 Gwei = 1,000,000,000,000,000,000 Wei
- Gwei: A unit for gas price. 1 Gwei = 0.000000001 ETH = 1,000,000,000 Wei. Named after Wei Dai, a computer scientist.
- Wei: The smallest unit of Ethereum. 1 Wei = 0.000000000000000001 ETH = 0.000000001 Gwei. Named after Wei Dai.
Precision and Accuracy
Our converter uses JavaScript BigInt for all calculations, which means:
- No floating-point precision errors
- Exact integer arithmetic for all conversions
- Support for very large numbers (up to 100 digits)
- Reversible conversions - convert back and forth without loss
Rounding Options
- Auto: Smart rounding based on value size and unit
- 2-18: Fixed decimal places (2, 4, 6, 9, or 18)
- Full: Show all significant decimal places for precise reverse conversion
Common Use Cases
- Gas price calculations: Converting between Gwei and ETH for transaction fees
- Smart contract development: Working with Wei for precise calculations
- Portfolio tracking: Converting between different units for display
- Educational purposes: Understanding Ethereum unit relationships
Input Format Support
The converter accepts various input formats:
- Decimal numbers: 1.5, 0.001, 42.123456789
- Thousand separators: 1,000.5 or 1 000,5 (locale-aware)
- Large integers: 1000000000000000000 (for Wei)
- Leading/trailing zeros are preserved during editing
💡 Pro Tip
Use the "Full" rounding option when you need to convert back and forth between units without losing precision. This is especially useful for smart contract development and precise financial calculations.