Ethereum Gas Cost Calculator
Ethereum gas cost calculator
Fee in gwei
Fee in ETH
Fee in USD
Cost per 100k gas
A gas fee is the gas price you pay multiplied by the gas your transaction consumes. Only the first part moves with congestion; the second is a property of what you are doing, which is why a token swap costs several times what sending ETH costs at the identical gas price. The gas limits offered are typical observed figures for those actions, not fixed constants — the real amount depends on the specific contract, and a first-time interaction usually costs more than a repeat. For the current gas price see our gas tracker; for bitcoin, the fee calculator. Only the USD line uses a price from our pipeline.
What this calculator does
It multiplies a gas price in gwei by the gas an action consumes, and expresses the result in gwei, in ETH and in dollars — with presets for the actions people actually perform.
Two numbers, only one of which moves with congestion
A gas fee is gas price × gas used. The gas price is the market rate and changes minute to minute. The gas used is a property of what you are doing and barely changes at all: sending ETH is 21,000 gas whether the network is quiet or on fire.
That is why actions differ so much in cost at the same gas price. At 12 gwei:
- Send ETH, 21,000 gas — a few tens of cents
- Send an ERC-20 token, around 65,000 gas — roughly three times as much
- Swap on a V3-style DEX, around 184,000 gas — roughly nine times as much
The token transfer costs more than the ETH transfer because it runs contract code rather than simply moving a balance. Nothing about the amount being sent affects either figure.
About the presets
They are typical observed gas limits for those actions, not protocol constants. Real usage depends on the specific contract, and a first interaction with a contract usually costs more than a later one because storage is being written for the first time. If your wallet shows you an estimate, prefer it and use Custom.
Where the numbers come from
You supply the gas price; we do not cache one here because it changes far faster than any cache would be honest about. Our gas tracker shows current Safe, Standard and Fast tiers. Only the dollar line uses an ETH price from our pipeline — see our methodology. For bitcoin fees, which work on an entirely different basis, use the bitcoin fee calculator.
Frequently asked questions
What is the difference between gas price and gas limit? Price is what you pay per unit; limit is the maximum units you authorise. You are charged for gas actually used, up to that limit.
Why did my transaction cost more than this says? Usually higher real gas usage than the preset, or a priority fee above the base fee during congestion.
Does a failed transaction still cost gas? Yes. The work was done even though the outcome reverted.
Is this advice? No. See our disclaimer.