The developer tools you reach for every day, all in one place.
Converters, formatters, hashes, validators, and the small utilities you keep reopening stay together instead of getting lost across tabs.
/ Tools
■Gas Price Estimator
Estimate Ethereum transaction costs in ETH and USD
What is Gas?
Gas is the unit of measurement for the computational work required to execute operations on Ethereum. Gas prices are denominated in Gwei (1 Gwei = 10⁻⁹ ETH). The total transaction cost equals gas used multiplied by gas…
How does it work?
Gas Limit vs Gas Used Gas limit is the maximum amount of gas you're willing to spend on a transaction. Gas used is the actual amount consumed. If the limit is too low, the transaction fails. Unused gas is refunded. Gas…
Sample Cases
Covers Simple ETH transfer at 20 Gwei, ERC20 transfer at 50 Gwei (ETH = $2500), and DEX swap at 100 Gwei (ETH = $2500) so you can compare common inputs and outputs quickly.
/ Code
■Source code from the selected tool, shown here alongside the live version on the right.
// npm install viem
import { parseGwei, formatEther, formatGwei } from 'viem';
interface GasEstimate {
gasLimit: number;
gasPriceGwei: number;
totalGwei: bigint;
totalEth: string;
totalUsd: string;