Every Ethereum transaction costs 'gas,' priced in Gwei (a tiny fraction of ETH), and the total fee depends on how much computational work the transaction requires (gas limit) and how much you're paying per unit of gas (gas price).
Every Ethereum transaction costs 'gas,' priced in Gwei (a tiny fraction of ETH), and the total fee depends on how much computational work the transaction requires (gas limit) and how much you're paying per unit of gas (gas price). This calculator converts that into both ETH and USD so you know the real-world cost before you send a transaction.
A simple transfer uses 21,000 gas at a gas price of 30 Gwei, with ETH at $3,000. Fee = 21,000 × 30 × 10⁻⁹ = 0.00063 ETH. Fee in USD = 0.00063 × 3000 ≈ $1.89.
It's the fee paid to process a transaction or smart contract on the Ethereum network, priced in "gwei" (a small fraction of ETH) and based on network demand.
Total fee = gas used × gas price (in gwei), then converted to ETH and its equivalent fiat value.
Gas prices rise and fall based on network congestion — more people trying to transact at once drives up the price needed to get your transaction processed quickly.