ERA Calculator

Calculate a pitcher's Earned Run Average (ERA) in baseball.

Baseball ERA Calculator

Enter a pitcher's earned runs and innings pitched to calculate their ERA.

Result:

ERA

How does this ERA compare?

ERA Range	Rating
Below 2.00	Excellent
2.00 - 3.00	Very Good
3.01 - 4.00	Good
4.01 - 5.00	Average
Above 5.00	Below Average

How to use this calculator

Earned Run Average (ERA) is a statistic used to measure a baseball pitcher's effectiveness. It represents the average number of earned runs a pitcher allows per nine innings pitched.

ERA = (Earned Runs ÷ Innings Pitched) × 9

To use this calculator:

Enter the number of earned runs allowed by the pitcher.
Enter the number of innings pitched. For partial innings, use decimals:
- 1 out = 0.1 innings (e.g., 7.1 for 7⅓)
- 2 outs = 0.2 innings (e.g., 7.2 for 7⅔)
Click "Calculate ERA" to get the result.