Gas Fee Calculator
Compare live transaction costs across major EVM networks before you confirm a swap, transfer, NFT mint, or contract call.
How Gas Fees Work Across Networks
Gas fee estimates come from three inputs: gas limit, gas price in Gwei, and the current token price. The calculator turns that into a native coin cost and a USD estimate so you can compare networks before you submit a transaction.
Use the main calculator to compare Ethereum, BSC, Polygon, and other EVM networks side by side. If you want a chain-specific explanation, open the dedicated Ethereum gas fee calculator, BSC gas fee calculator, Polygon gas fee calculator, or Arbitrum gas fee calculator.
Chain-Specific Gas Fee Pages
Gas Fee Calculator FAQ
What is a crypto gas fee?
Gas is the fundamental network fee required to execute transactions, deploy smart contracts, or mint NFTs on decentralized blockchains like Ethereum. It strictly compensates the network validators and miners for utilizing their expensive computational power and hardware to process, verify, and permanently secure your specific transaction on the immutable public ledger.
How is the Ethereum gas fee calculated?
Your total transaction fee is calculated via a precise formula: Gas Limit multiplied by the Base Gas Price (measured in Gwei). The Base Gas Price fluctuates violently second-by-second based on network congestion. During a hyped NFT mint, a simple token swap that normally costs $3 can instantaneously spike to $80 as thousands of users bid up the Gwei price.
What is Gwei?
Gwei is a hyper-specific micro-denomination of Ether (ETH), engineered to make microscopic gas calculations readable for humans and machines. Exactly 1 Gwei is equal to 0.000000001 ETH (one-billionth of an ETH). Instead of writing a complex fee as 0.000000045 ETH, decentralized applications and wallets simply display it as a highly readable '45 Gwei'.
Why did my transaction fail but still charge gas?
When you execute a smart contract, you must specify a 'Gas Limit'—the absolute maximum computational steps you are willing to pay for. If the contract executes incredibly complex logic and hits that strict limit before finishing, the transaction fails entirely and reverts. However, because the network still expended raw computational energy processing it, the consumed gas is permanently burned.
How can I reduce my gas fees?
The most effective method to slash gas costs is routing your transactions through Layer 2 (L2) scaling solutions like Arbitrum, Optimism, or Base, which compress and batch thousands of transactions, reducing fees by up to 99%. If you must use Ethereum Mainnet, actively monitor Gwei trackers and schedule your massive DeFi transactions during off-peak weekend hours.
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