Free tool

Gas Fee Converter, Gwei to ETH & USD

Estimate Ethereum transaction and deployment costs, and convert between Wei, Gwei and ETH. Free and fully in-browser.

Transaction cost

Estimate what a transaction or deployment will cost.

Cost in Gwei630,000
Cost in ETH0.00063
Cost in USD$2.21

Unit converter

Convert between Wei, Gwei and ETH.

Wei1000000000
Gwei1
ETH0.000000001

1 Gwei = 10⁹ Wei · 1 ETH = 10⁹ Gwei = 10¹⁸ Wei

Shipping a contract? Deployment gas is only part of the risk. Scan it first with our free vulnerability scanner and budget with the audit cost estimator.

Understanding Ethereum gas

Every operation on Ethereum costs gas. The total fee you pay is the gas limit (how many units the transaction consumes) multiplied by the gas price in Gwei. Simple transfers are cheap and predictable at 21,000 gas; contract calls and deployments cost far more and vary with what the code does.

Denominations trip people up: gas prices are quoted in Gwei, balances in ETH, and the EVM works in Wei. 1 ETH = 10⁹ Gwei = 10¹⁸ Wei. The unit converter above moves cleanly between all three with full precision.

Frequently asked questions

Fee = gas limit × gas price. Gas limit is the number of gas units the transaction uses (21,000 for a simple ETH transfer); gas price is what you pay per unit, quoted in Gwei. Multiply them for the cost in Gwei, divide by 1,000,000,000 for ETH, then multiply by the ETH price for USD. This tool does all three for you.

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