GasBench — Free Ethereum gas fee and reserve calculator

Calculate Ethereum execution-fee scenarios from your own gas, gwei and ETH-budget inputs. Compare an assumed fee with the maximum reserve and work out a batch budget. Exact arithmetic, clear units and local exports.

No live price or gas feed. This does not estimate contract gas, simulate transactions, include rollup data fees or guarantee a transaction will succeed. Use your wallet’s current estimates and confirm the asset and network.

Open: https://gas-bench.foggyibis16.chatgpt.site/

Published by First Fold. No signup, wallet connection, signing, input upload or runtime AI. Offline HTML and MIT source are free. Hosted pages offer optional anonymous counts, off by default; offline editions omit analytics. All features remain free. Optional donations: USDT on Ethereum mainnet ERC20 only.

Part of eight free tools: https://first-fold-launch.foggyibis16.chatgpt.site/crypto-toolkit.html