Gas Fees & Transaction Mechanics

Every action on Ethereum requires computational work. Gas is the unit measuring that effort. Gas Fee = Gas Used times Gas Price (in Gwei). Simple ETH transfers use about 21,000 gas units; complex DeFi swaps might use 200,000+. Gas prices fluctuate with network demand, busy times mean higher fees.

EIP-1559 (August 2021) reformed Ethereum's fee market. Transactions now have a 'base fee' (determined by the network, then burned) and an optional 'priority tip' for faster inclusion. The burning mechanism means Ethereum can become deflationary during high network usage, more ETH destroyed than created through staking rewards.

EIP-4844 (March 2024) introduced 'blob space' that reduced Layer 2 costs by 10-100x. What cost $0.50 on Arbitrum now costs fractions of a cent. This was a game-changer for everyday Ethereum usage, as most daily activity migrated to L2s while mainnet handles high-value transactions and L2 settlement.

Practical tips: transact during low-activity hours (weekends, early mornings UTC), use L2 networks for routine transactions, batch operations when possible, and always check current gas prices before confirming. Tools like Etherscan's gas tracker help you time transactions for lowest costs.