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GameCalc
The gold standard for pitching performance.
ERA is (earned runs ÷ innings pitched) × 9 — it estimates how many runs a pitcher would give up over a complete nine-inning game, stripping out unearned runs caused by fielding errors.
In modern MLB, an ERA under 3.00 is excellent, 3.00–4.00 is above average, and above 5.00 is below average — though these thresholds shift across eras (the 'dead-ball era' saw sub-2.00 league averages).
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OpenLast updated: August 2026
ERA
2.25
What you entered
Earned runs per inning
25 / 100= 0.25ERA = (earned runs / innings pitched) x 9
0.25 x 9= 2.25Result
ERA: 2.25