Gwei
Also known as: Gigawei, Nanoether, ETH Subunit
A denomination of Ether used to measure gas prices in the Ethereum network, where 1 Gwei equals 0.000000001 ETH.
Gwei is a subunit of Ether (ETH) used to express gas prices for transactions and operations on the Ethereum network. One Gwei equals one-billionth of an ETH (10⁻⁹ ETH). It is the most common unit for setting transaction fees, making values easier to manage and understand compared to raw ETH amounts. For example, a gas price of 20 Gwei means a user is willing to pay 20 billionths of an ETH per unit of gas. Gwei helps standardize fee markets and is essential in wallet UX, developer tooling, and protocol fee estimations.