How Gas Fees Work: Base Fees, Priority Tips, and Gwei Optimization
Understand the mechanics of Ethereum gas limits, gwei pricing, base fee burns under EIP-1559, and how Layer-2 rollups reduce fees by 99%.
Step-by-Step Practical Instructions
2 Action StepsGas Units vs Gas Price (Gwei)
Gas is the measure of computational steps (a simple transfer requires 21,000 gas units; a complex DEX swap requires 150,000+). Gas price is the cost per unit expressed in gwei (1 gwei = 0.000000001 ETH).
The EIP-1559 Base Fee Burn Mechanism
The Base Fee is set algorithmically based on prior block congestion. This fee is permanently burned (destroyed from supply), making ETH deflationary during high activity.
Frequently Asked Questions
Why are gas fees so much cheaper on Layer-2 networks?
Layer-2 rollups execute hundreds of transactions off-chain and post compressed data blobs (EIP-4844) to Ethereum, splitting Layer-1 security costs among thousands of users.
This guide is grounded in primary source documentation, cryptographic standards, and regulatory filings:
- EIP-1559 Specification: Fee Market Change— Ethereum Foundation (2021-08-05)
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