ChainTools

Ethereum Gas Calculator

Gas used times gas price — the formula behind every Ethereum transaction's cost.

Different actions use very different amounts of gas

A simple ETH transfer costs a fixed 21,000 gas, but smart contract interactions like token swaps, NFT mints, or complex DeFi transactions can use hundreds of thousands of gas — check the specific transaction type's typical gas usage.

Gas price fluctuates with network demand

Gas price in Gwei rises and falls with how busy the Ethereum network is — the same transaction can cost dramatically more during periods of high demand than during quiet periods.

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ChainTools

Ethereum Gas Calculator

Gas used times gas price — the formula behind every Ethereum transaction's cost.

Gas used (units)

Gas price (Gwei)

Cost (ETH)

0.001

A simple ETH transfer uses 21,000 gas; smart contract interactions (swaps, mints, etc.) use much more — check the specific transaction type.

What you entered

Gas used (units): 21000Gas price (Gwei): 30

1
Cost = gas used × gas price ÷ 1e9
21000 × 30 Gwei ÷ 1,000,000,000= 0.00063000 ETH

Result

Cost (ETH): 0.001

21000 gas at 30 Gwei costs 0.00063 ETH.

Different actions use very different amounts of gas

Gas price fluctuates with network demand

Gas price in Gwei rises and falls with how busy the Ethereum network is — the same transaction can cost dramatically more during periods of high demand than during quiet periods.