Gwei
Unit for measuring gas price on Ethereum network — 1 gwei = 0.000000001 ETH.
Gwei is a unit of Ethereum cryptocurrency equal to one billionth of ETH, used primarily to express gas prices.
Unit system:
•1 ETH = 1,000,000,000 gwei
•1 gwei = 0.000000001 ETH (1 nanoeth)
•Wei = base unit: 1 ETH = 10^18 wei
How gwei works in practice:
•You read: "Gas price is 20 gwei"
•Transaction: 21,000 gas limit × 20 gwei = 420,000 gwei = 0.00042 ETH
•If ETH = $3,000 → transaction costs $1.26
Gas price vs Base fee (EIP-1559):
•Base fee: 15 gwei (example)
•Priority fee: 1 gwei (tip for faster)
•Max fee: 20 gwei (maximum you're willing to pay)
Tools for tracking gwei:
•Etherscan Gas Tracker
•GasNow
•MetaMask automatically suggests gas (low/medium/high)
When gwei is low:
•Weekend mornings (UTC) — less DeFi activity
•Periods of low volatility
•Nighttime in Asian hours