Gas Cost
Convert gas units and gwei into a network fee in real money.
Runs offline
Enter gas units, fee rate in gwei, and native token price.
About gas cost
A network fee is gas units multiplied by fee rate, and only one of those is under your control. Gas units are fixed by what the transaction does — around 21,000 for a plain transfer, 65,000 for an ERC-20 transfer, 150,000 or more for a swap — while the fee rate in gwei moves with demand. This converts the two into real money at a given native token price, which is the number that actually decides whether an action is worth taking.
Common questions
How do I calculate an Ethereum gas fee?
Multiply the gas units the transaction uses by the gas price in gwei, then by the price of the coin. This page does that arithmetic with your numbers. A plain transfer is 21,000 units, an ERC-20 transfer about 65,000, an approval about 46,000, and a swap between 150,000 and 350,000.
How much is 1 gwei in USD?
One gwei is 0.000000001 ETH, so its dollar value is the ETH price divided by a billion — a fraction of a cent on its own. Gwei only becomes a real number when multiplied by the gas a transaction uses, which is why this page asks for both.
Why are Ethereum gas fees so high?
Because block space is auctioned and there is a fixed amount of it per block, so the price is set by how many people want to transact at that moment rather than by any schedule. The same transaction on a rollup typically costs a small fraction of the mainnet price, and the gas tracker here prices a send and a swap across fourteen networks side by side.