Ethereum Gas Fee Calculator

Every transaction on Ethereum carries a fee paid in gas, and those fees move with network demand. The base fee is recalculated for every block and can move by up to 12.5% from one block to the next; on 24 September 2026 it was around 0.1 gwei or less. That means the price of sending tokens or interacting with a dApp can swing noticeably from one moment to the next. Knowing what a transaction is likely to cost before you confirm it lets you budget and sidesteps the surprise of an oversized fee.

The arithmetic behind a gas fee is simple: Gas Fee = Gas Limit x Gas Price. The gas limit is the ceiling on computational work you authorize for the transaction, and the gas price, quoted in gwei (one-billionth of an ETH), is what you pay for each unit of that work: the base fee plus any priority fee, or tip. Supply both numbers and the calculator returns the cost in ether and, at the ETH price you enter, in dollars. The network charges only for gas actually used, so limit × price is the most you can pay; a plain ETH transfer uses exactly 21,000 gas, so for it the result is the exact fee.

Setting the gas limit higher than needed won't speed anything up, but it won't cost more either, because unused gas is returned; set it too low and a contract call can run out of gas partway, which reverts the transaction while still consuming all the gas it was given. Pulling a live gas estimate from a trusted source such as Etherscan or your own wallet keeps your limit and price in the realistic range where transactions actually go through.