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ERA Calculator

To calculate ERA, enter the following:
If you need to enter a partial inning, .3333 is for a third of an inning and .6666 is for two thirds, etc.
Total number of earned runs:
Number of innings pitched:

About ERA Calculator

The online ERA Calculator is used to calculate the ERA (earned run average) used in baseball statistics.

ERA Definition

In baseball statistics, Earned Run Average, or ERA, is one of the most well known pitching statistics and represents the average number of earned runs a pitcher will give up per nine-inning game. It determined by dividing the total number of earned runs allowed by the number of innings pitched and multiplying by nine.

ERA Calculation Formula

The ERA is calculated using the following formula:

ERA = 9 × Earned Runs Allowed / Innings Pitched


For example, a pitcher who allows 3 earned runs in 7 innings pitched would have an ERA of 3.86 (9 × 3 / 7).

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