The Ethereum gas fee calculator helps you estimate the exact cost of your transaction before you send it. Input the gas limit and current Gwei price to see the fee in both ETH and USD — preventing costly surprises.
How to Use the Gas Fee Calculator
Gas Limit: Max gas units your transaction can use. ETH transfer = 21,000. ERC-20 = 65,000. Uniswap swap = 150,000.
Gas Price (Gwei): Current base fee + priority tip. Check live tracker for current rates.
ETH Price (USD): Current ETH/USD market price (~$2,000 in March 2026).
Formula: Fee (ETH) = Gas Limit × Gas Price × 0.000000001. Multiply by ETH/USD for dollar amount.
Example Calculations (March 2026, Gas: 0.15 Gwei, ETH: $2,000)
Simple ETH transfer: 21,000 gas = $0.0063
ERC-20 transfer: 65,000 gas = $0.0195
Uniswap V3 swap: 150,000 gas = $0.045
NFT mint (100k gas) = $0.030
Setting the Right Gas Price
Modern wallets like MetaMask and Rabby offer Low, Market, and Aggressive presets. Always base your calculation on the live base fee from the current block. Setting your max fee too low risks transaction failure.