Gwei
Unit of measurement for Ethereum gas prices; 1 gwei equals 0.000000001 ETH (10⁻⁹ ETH).
Gwei is short for "giga-wei," where wei is the smallest indivisible unit of ether (1 ETH = 10¹⁸ wei). Gas prices are quoted in gwei because the absolute ETH value of each operation is so small that quoting in ETH would mean writing 0.000000020 instead of just "20 gwei."
A typical Ethereum mainnet transaction in 2025-2026 costs 5-50 gwei per gas unit. Multiplied by typical operations (21,000 gas for a simple transfer, 200,000+ for a swap), that yields fees in the $0.50-$15 range depending on ETH price and congestion.
Gwei is the industry-standard unit you'll see in wallets, fee trackers, and block explorers. Knowing it lets you sanity-check what you're paying without doing exponent math each time.
Gwei is the practical denomination of every Ethereum transaction fee. Anyone interacting with EVM chains needs to know what 20 gwei vs 200 gwei means for their wallet.
How CryptoRadar24 tracks it
CryptoRadar24 reports gas dynamics in human-readable USD where useful, but technical content uses gwei for accuracy.
Related terms
FAQ
How is gwei different from wei?
Wei is the smallest unit (10⁻¹⁸ ETH); gwei is one billion wei (10⁻⁹ ETH). Gwei is the practical denomination for fees because raw wei numbers are unwieldy.
What is a "low" vs "high" gwei?
Below ~10 gwei is low (off-peak hours). 20-50 gwei is typical. 100+ gwei signals high congestion. Above 300 gwei usually means a major NFT drop or DeFi event.
Do other chains use gwei?
EVM-compatible chains (Polygon, BNB, Arbitrum, Base, etc.) all use gwei as the gas-price unit because they share Ethereum's execution model.
Is gwei the same on layer-2s?
The unit is the same, but the values are 10-100x lower. A 0.01 gwei transaction on Base costs less than $0.01.