If you've ever been mid-transaction and had absolutely no idea what gas price to set, you're not alone. It's one of those things that trips up every Web3 developer at some point — especially when you're jumping between chains and each one has completely different fee dynamics.
We built a free browser-based tool to solve exactly this.
What It Does
The EVM Gas Fee Calculator gives you real-time gas prices for Ethereum, BNB Chain, Polygon, and other EVM-compatible networks. It fetches live fee data directly from public RPC endpoints every 30 seconds and shows you everything you need:
- Current gas price in Gwei and Wei
- EIP-1559 Max Fee Per Gas
- Max Priority Fee (validator tip)
- Estimated transaction cost in ETH
No wallet connection. No API key. Just open it and the data is already there.
👉 Try it free — freeapptools.co
Video Walkthrough
How to Use It
Select your chain from the dropdown — Ethereum, BNB Chain, Polygon, or whichever EVM network you're working on. The live gas prices load immediately.
Enter your gas limit. For a standard ETH transfer that's 21,000. For ERC-20 transfers use around 65,000. For smart contract interactions it varies — anywhere from 100,000 to 500,000 depending on what you're calling.
Hit Calculate and you get the estimated fee in ETH instantly. One click copies it to your clipboard.
EIP-1559 Support
A lot of calculators out there still only show legacy gas prices. This one gives you the full EIP-1559 breakdown — Base Fee, Max Fee, and Priority Fee — so you're working with the actual values your wallet submits on modern Ethereum transactions.
Multi-Chain
Switch between chains and the live data updates immediately. Useful when you're deciding whether to deploy on Ethereum or move to a cheaper L2. The difference in gas costs between Ethereum mainnet and Polygon can be dramatic — seeing it in real numbers makes the decision easier.
Stack Used
Built with Next.js, Ant Design, and ethers.js. Gas data is fetched using provider.getFeeData() from ethers.js connected to public RPC endpoints. All calculations happen client-side — no backend involved.
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