Estimador de Gas Fee

Ethereum gas fee

On Ethereum, every transaction carries a gas fee that pays validators back for the computation. The math is fee = gas_used × gas_price, and the price is quoted in gwei (1 gwei = 10⁻⁹ ETH). How much gas a transaction burns depends on what it does. A plain ETH transfer runs about 21,000 gas, an ERC-20 token transfer around 50,000, a swap on Uniswap roughly 150,000, and minting an NFT close to 300,000. Take an example: 21,000 gas at 30 gwei works out to 0.00063 ETH, or about US$2.20 when ETH sits at US$3,500. Since EIP-1559 (August 2021) the price splits in two — a base fee that gets burned and a priority tip that goes to the validator. The tip is what bumps you up for inclusion in the next block.

Applications

Check the cost before you fire off a transaction in MetaMask, Rabby, or a hardware wallet. Weigh Mainnet against Layer 2 rollups like Arbitrum, Optimism and Base, where you'll pay 10 to 100 times less. Plan DeFi moves on Aave or Curve, time NFT mints around congestion peaks, run arbitrage. For history, Etherscan tracks past gas; ETH Gas Station and Blocknative forecast what the next few blocks will cost.

FAQ

Why does the price vary so much? It tracks demand for block space. During a hot NFT mint or a DeFi rush, gwei can leap from 20 to north of 200.

What is "gas limit"? It's the ceiling of gas you allow. If execution needs less, you're only charged for what it actually used. Set it too low and the transaction fails — and you still pay the fee.

Is L2 always cheaper? For everyday use, yes. Once the amounts get large, factor in the bridge cost and how long L1 takes to finalize.

How to lower the cost? Send when traffic is quiet, like early morning UTC. Move to an L2. Group transfers through multi-send contracts. And stay away from mints while the hype is loud.