Gas Fee Calculator for Ethereum and EVM Chains

How to use the gas calculator

Select the network whose native coin pays for gas and a transaction type. Presets fill a typical gas amount: 21,000 for a plain coin transfer, around 65,000 for an ERC-20 token transfer such as USDT or USDC, roughly 180,000 for a DEX swap. These are typical values, not guarantees — the real gas used depends on the contract, so edit the number if your wallet shows a different estimate.

Enter the current base fee and priority fee in gwei (your wallet or any gas tracker shows them), and optionally a max fee. The coin price is filled from the live ticker when available. The result shows the expected fee, the effective gas price and, if you set a max fee, the worst case you could be charged.

The gas fee formula

Since the London upgrade (EIP-1559), Ethereum fees have two parts: a base fee set by the network, which is burned, and an optional priority fee (tip) that goes to the validator.

Examples

• ETH transfer, 21,000 gas at 20 gwei: 420,000 gwei = 0.00042 ETH ≈ $1.26 at $3,000 per ETH.
• USDT (ERC-20) transfer, 65,000 gas at 2 gwei base + 0.5 gwei tip: 162,500 gwei = 0.0001625 ETH ≈ $0.49 at $3,000.
• DEX swap, 180,000 gas at 30 gwei during congestion: 0.0054 ETH ≈ $16.20 at $3,000.

The same transaction can cost 10–50 times more during a busy hour than on a quiet weekend morning, because the base fee rises automatically when blocks are full. If the transfer is not urgent, waiting for a lower base fee is the easiest saving.

Gas limit, gas used and why you are refunded

Your wallet sets a gas limit — the maximum gas the transaction may consume. You pay only for the gas actually used, and the unused part of the limit is not charged. Similarly, with EIP-1559 you set a max fee per gas, but pay only base fee plus tip; the difference is not charged. If the limit is too low, the transaction fails and the gas spent until the failure is still paid — a common and painful mistake with custom gas settings.

How to pay less gas

A few practical habits make a big difference:

• Send stablecoins on a cheaper network when the recipient supports it — compare routes with the Stablecoin Fee Comparison.
• Avoid sending tokens during market-wide events when everyone transacts at once.
• Batch operations: one larger transfer instead of several small ones.
• On Layer-2 networks the fee also includes an L1 data component, so the wallet preview is the best estimate.
• Keep a small balance of the native coin (ETH, BNB, POL) — without it you cannot move tokens at all.

Glossary

Wallets often hide these fields behind “slow / normal / fast” presets. Opening the advanced view and comparing the numbers with this calculator is a good way to see what each preset really costs.

• Gas — a unit of computational work; every operation in a transaction costs a fixed amount of gas.
• Gas limit — the maximum gas you allow the transaction to use.
• Base fee — the minimum price per gas set by the protocol for each block; it is burned.
• Priority fee (tip) — an extra price per gas paid to the validator to include your transaction sooner.
• Max fee — the most you agree to pay per gas; you pay less if base fee + tip is lower.
• Gwei — 10⁻⁹ ETH, the usual unit for gas prices.