Estimate Ethereum gas fees from the gas price in Gwei and your gas limit — in ETH and USD. Presets or custom, computed in your browser with no RPC calls.
All calculations happen locally in your browser. Nothing leaves your device.
Gwei = 10⁻⁹ ETH (one-billionth of an ETH). Fee = gas limit × gas price × 10⁻⁹.
Every Ethereum transaction pays a fee equal to the gas it consumes, priced in Gwei. This calculator does the multiplication for you: fee = gas limit × gas price × 10^-9 ETH.
Gwei is one-billionth of an ETH (10^-9). The Ethereum network prices gas in Gwei, so a 20 Gwei gas price means each unit of gas costs 0.000000020 ETH. To get the fee in ETH you multiply the gas limit by the gas price and divide by 1,000,000,000.
A plain ETH transfer always consumes exactly 21,000 gas — one base unit per byte of the standard transfer — so 21,000 is the natural default for this calculator. Contract interactions cost more (50,000–150,000+), and you can pick common presets or enter a custom limit.
No. It never calls an RPC node or any external API — you type in the gas price you want to use (for example, one read from Etherscan or your wallet), and the calculator multiplies it by your gas limit. That keeps the tool fast, offline-friendly and completely private.
It is an optional conversion. Enter an ETH price in USD (3,000 by default) and the tool multiplies your fee in ETH by that price to show what the transaction costs in dollars. Leave the field empty and only the ETH amount is shown. The price is never fetched from the web.
No. All calculations run locally in your browser with zero uploads and zero tracking. The gas price, gas limit and ETH price live only in this page and disappear when you close it.
If you just finished with Ethereum Gas Fee Calculator, the natural next steps are Exchange Fee Calculator, Crypto P&L Calculator, Grid Trading Calculator, or browse every tool in Crypto Tools.