Ethereum Gas Fee Calculator
Transaction cost from gas limit, gas price (gwei) and ETH price — EIP-1559 base + priority fee, in ETH and fiat.
Since EIP-1559, you pay base fee (algorithmically set by network demand, then BURNED) plus a priority fee (tip to the validator). Gas limit is the work units: 21,000 for a plain transfer, 100k–300k+ for swaps and NFT mints. A failed transaction still costs the gas it consumed.
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.
Disclaimer: This tool is for general informational and estimation purposes only and is not professional financial, tax, accounting or legal advice. All figures are estimates — verify with a qualified professional before making decisions. Read the full disclaimer.
About Ethereum Gas Fee Calculator
The Ethereum gas fee calculator turns the three numbers that determine a transaction's cost — gas limit, gas price in gwei, and the ETH/fiat rate — into a clear total in ETH and dollars. It models the post-EIP-1559 fee structure: a base fee set by network congestion (and burned) plus a priority fee that tips the validator to include your transaction. Whether you're estimating the cost of a simple transfer (21,000 gas), a token swap (100k+), or an NFT mint, it shows what you'll actually pay before you sign — and why fees spike when the network is busy.
How to use Ethereum Gas Fee Calculator
- 1Enter your values into Ethereum Gas Fee Calculator — 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 Ethereum Gas Fee Calculator?
- ✓Computes Ethereum Gas Fee instantly in your browser — no sign-up, no upload, no server round-trip.
- ✓100% free and unlimited, with the exact formula shown: fee = gasLimit × (baseFee + priorityFee) gwei ÷ 10⁹ → ETH.
- ✓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
How is an Ethereum gas fee calculated?+
Fee = gas units used × gas price per unit. Gas limit is the work (21,000 for a plain ETH transfer, more for contract interactions); gas price (in gwei) is what you pay per unit, equal to base fee + priority fee post-EIP-1559. Multiply and divide by 10⁹ to get ETH, then by the ETH price for fiat — exactly what this tool does.
What changed with EIP-1559?+
EIP-1559 (Aug 2021) replaced the simple auction with a base fee + priority fee model. The base fee is set algorithmically by network demand and is BURNED (removed from supply, not paid to anyone); the priority fee is a tip to the validator for inclusion. This made fees more predictable and made ETH deflationary during high usage.
Why do gas fees vary so much?+
The base fee rises and falls with network congestion — when many people transact, blocks fill and the base fee climbs to ration space; in quiet periods it drops to a few gwei. Complex transactions (swaps, mints) also use far more gas units. Timing transactions for low-demand hours and using Layer-2s are the main ways to cut fees.
Do I pay gas even if my transaction fails?+
Yes — gas pays for computation, and a transaction that reverts (fails) still consumed computation up to the failure point, so you're charged for the gas used. This is why failed swaps or mints during congestion can cost real money for nothing. Setting an adequate gas limit and slippage helps avoid reverts.
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