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Cryptocurrency

Ethereum Gas Fees Explained: Why Transactions Cost Money

Jul 25, 2026 · 7 min

Ethereum Gas Fees Explained

Gas fees are the cost users pay to process transactions on the Ethereum network. Every operation - sending ETH, swapping tokens, minting NFTs - requires computational resources, and gas is how you pay for them.

What Is Gas?

Gas is measured in gwei (1 gwei = 0.000000001 ETH). The total fee depends on:

  • Gas Limit: Maximum units of gas the transaction can use
  • Base Fee: Algorithmically determined network demand
  • Priority Fee: Tip to miners/validators for faster inclusion

Why Do Fees Fluctuate?

Gas prices change based on network demand. When many users want to transact simultaneously, fees rise. When the network is quiet, fees drop.

How to Save on Gas

  1. Transact during off-peak hours (weekends, early mornings UTC)
  2. Use Layer 2 networks (Arbitrum, Optimism, Base)
  3. Set a reasonable gas limit
  4. Use our Gas Estimator to check current prices across networks

EIP-1559 Explained

Since August 2021, Ethereum uses a base fee burning mechanism. The base fee is destroyed (burned), making ETH potentially deflationary during high demand periods.