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Earned Run Average Calculator
Compute a pitcher ERA from earned runs and innings pitched.
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ERA
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Compute a pitcher ERA from earned runs and innings pitched.
Earned Run Average Estimator
Enter your numbers below for an instant estimate.
0
💡 Tip: ERA = earned runs x 9 / innings pitched.
How It Works
Key concepts behind this calculator
1
Enter Values
Fill in each field with your own numbers.
2
Calculate
Results update as you change the inputs.
3
Review
Read the breakdown and the explanation.
4
Adjust
Change values to compare scenarios.
Quick Reference Guide
Earned Quick Guide
Typical values for reference.
| ER | IP | Innings in game | ERA |
|---|---|---|---|
| 45 | 180.1 | 9 | 2.25 |
| 30 | 100 | 9 | 2.70 |
| 60 | 210.2 | 9 | 2.56 |
| 12 | 40.1 | 9 | 2.68 |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
Earned Run Average Calculator FAQ
Answers to common questions about this calculator.
Earned runs times 9 divided by innings pitched.
Under 3.50 is strong.
0.1 for one out, 0.2 for two.
No.