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EIP-1559 Base Fee and Priority Tips: A Practical Guide
A clear, data-driven guide to eip-1559 base fee and priority tips.
Three fields
Type-2 transactions specify gas limit, maxFeePerGas and maxPriorityFeePerGas. The protocol charges min(maxFee, baseFee + priorityFee) per gas, refunding the rest.
Base fee updates
The next base fee equals current base fee × (1 + 1/8 × (gasUsed − target) ÷ target). A full 30M-gas block raises it 12.5 percent; ten full blocks in a row more than triple it.
Choosing a tip
In calm periods 0.01–1 gwei is sufficient. During NFT mints or liquidations, tips rise as users compete for inclusion, and MEV searchers pay large tips through bundles.
Units
1 ETH = 10^9 gwei = 10^18 wei. A 21,000-gas transfer at 15 gwei total costs 315,000 gwei, or 0.000315 ETH.
Practical tips
Wallets set maxFee to about twice the current base fee so transactions survive several full blocks. Stuck transactions can be replaced with the same nonce and a higher fee.
By the numbers
For EIP-1559 Base Fee and Priority Tips, the reference figures are topic of EIP-1559 Base Fee and Priority Tips, level of Intermediate, updated of 2026. The comparison table below lines up gas used, base fee, tip, cost (eth) — 21,000: 10 gwei / 1 gwei / 0.000231; 65,000: 20 gwei / 2 gwei / 0.00143; 150,000: 30 gwei / 2 gwei / 0.0048.
Modeling EIP-1559 Base Fee and Priority Tips with the Ethereum EIP1559 Gwei To USD Calculator
The Ethereum EIP1559 Gwei To USD Calculator takes three inputs — Gas used, Base+tip (gwei), ETH price ($). Fee = gas × gwei × 1e-9 × ETH price. With its default inputs (Gas used = 21000; Base+tip (gwei) = 20; ETH price ($) = 3000) it returns 1.26 $; swap in the figures from EIP-1559 Base Fee and Priority Tips above to reproduce the scenario yourself.
Modeling EIP-1559 Base Fee and Priority Tips with the Wei Gwei Ether Unit Converter
The Wei Gwei Ether Unit Converter takes three inputs — Gwei, ETH price ($), Multiplier. ETH = gwei × 1e-9; 1 gwei = 1e9 wei. With its default inputs (Gwei = 1000000; ETH price ($) = 3000; Multiplier = 1) it returns 3 $; swap in the figures from EIP-1559 Base Fee and Priority Tips above to reproduce the scenario yourself.
Data Table
| Gas used | Base fee | Tip | Cost (ETH) |
|---|---|---|---|
| 21,000 | 10 gwei | 1 gwei | 0.000231 |
| 65,000 | 20 gwei | 2 gwei | 0.00143 |
| 150,000 | 30 gwei | 2 gwei | 0.0048 |
Frequently Asked Questions
What happens if maxFee is below base fee?
The transaction waits until base fee falls.
Is the tip burned?
No, it goes to the proposer.
How fast can base fee change?
Up to 12.5 percent per block.
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For educational and informational purposes only. Not financial, investment, tax or legal advice. Figures are approximate and historical; crypto assets are volatile and you may lose capital. Do your own research.