For baseball coaches, players, and fans comparing pitching performances, ERA shows earned runs allowed per nine innings. Enter a pitcher’s earned runs and innings pitched to calculate a game, season, or career ERA. Compare two pitchers, check how one outing changes a season average, or see the calculation behind the number. Leave with the ERA and a comparison you can use in your analysis.
ERA
Calculate a pitcher’s ERA from earned runs allowed and innings pitched.
Use ERA
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What it writes
- ERA calculation with formula
- Side-by-side pitcher ERA comparison
- Updated ERA after a new outing
How to use it
Include earned runs and innings pitched, noting partial innings as outs—for example, 5⅔ innings. Say whether the numbers cover one game or a season so the ERA calculation matches your comparison.
What you bring
- Earned runs allowed
- Innings pitched, including partial innings
- Outing or season totals
- Use earned runs, not total runs
A good fit for
- Checking a starter’s ERA after allowing three earned runs in six innings
- Comparing two relievers with different innings totals and earned runs
- Finding how a strong outing changes a pitcher’s season ERA
Ways to start
A few requests this Agent can handle.
A pitcher allowed 3 earned runs in 6 innings. Calculate his ERA and show the formula.
Compare these pitchers: Rivera allowed 12 earned runs in 30 innings, and Lee allowed 9 in 20. Which ERA is lower?
A pitcher has 24 earned runs in 72 innings. What would his season ERA be after 7 scoreless innings? Show the calculation.
Good to know
This workspace provides text assistance.
- Official scoring decisions or league rule disputes
- Calculations rely on the numbers you enter.
- Cannot verify box scores or live statistics.
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Can I use the response in my work?
Use it as a draft to review and adapt. Verify calculations, facts, rights, and suitability before relying on it. Do not provide information you do not have permission to share.
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