Ethereum gas fees are the cost to execute any transaction on the Ethereum blockchain. Whether you are sending ETH, swapping tokens on a DEX, or minting an NFT, you must pay a gas fee in Ether to compensate the network validators who process your transaction.
How Ethereum Gas Fees Are Calculated
Since the London Hard Fork (EIP-1559) in August 2021, Ethereum uses a two-part fee model. The Base Fee is a mandatory minimum that is automatically burned. The Priority Fee (Tip) is an optional payment to validators to prioritize your transaction.
Total Gas Fee = Gas Limit × (Base Fee + Priority Fee)
A standard ETH transfer requires 21,000 gas units; a Uniswap V3 swap typically needs around 150,000 units.
Ethereum Gas Fee History
Average gas fees peaked at $53.16 on May 10, 2021 during the NFT and DeFi frenzy, when network congestion pushed prices above 220 Gwei. By 2025, fees had stabilized below $1 for most transactions, with the current 2026 average near $0.22 — a 96% decline from the 2021 highs.
Tips to Reduce Your Gas Fee
Use a gas tracker to identify low-fee windows (typically 2–8 AM UTC). Consider transacting on Layer-2 networks such as Arbitrum, Optimism, or Base, where fees can be as low as $0.001.