ERA Calculator
Calculate era from entered performance or equipment data.
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What this tool does
Calculate era from entered performance or equipment data. Enter fractional innings as outs, not decimal notation; 5.1 in baseball means 5 innings and 1 out.
How to use the ERA Calculator
- Enter or select earned runs.
- Enter or select whole innings pitched.
- Enter or select additional outs (0, 1 or 2).
- Read the calculated result; change any measurement to compare alternatives.
Formula
ERA=9×earned runs/(whole innings+additional outs/3)
- runs
- Earned runs
- innings
- Whole innings pitched
- outs
- Additional outs (0, 1 or 2)
Enter fractional innings as outs, not decimal notation; 5.1 in baseball means 5 innings and 1 out.
Worked example
For era calculator, the following measurements illustrate the exact method: Earned runs: 15; Whole innings pitched: 50; Additional outs (0, 1 or 2): 1.
Inputs
- Earned runs15
- Whole innings pitched50
- Additional outs (0, 1 or 2)1
Result
- Earned run average2.68
Results explained
- Earned run average
- Earned run average from the formula above. Enter fractional innings as outs, not decimal notation; 5.1 in baseball means 5 innings and 1 out.
Frequently asked questions
ERA=9×earned runs/(whole innings+additional outs/3)
Enter fractional innings as outs, not decimal notation; 5.1 in baseball means 5 innings and 1 out.
No. Verify competition rules, manufacturer guidance and measured conditions before relying on the estimate.
Each field identifies its required units. Do not mix game sensitivity scales, meters and yards, or grains and grams.
No. It is an entirely local calculation with no accounts or external data requests.