Baseball Earned Run Average ERA

Send Feedback

Is This Calculator Helpful?


What is Baseball Earned Run Average (ERA) Calculator?

In baseball statistics, the Earned Run Average (ERA) is the average of the runs earned on each nine innings pitch through a pitcher. Earnings are determined by dividing the number of runs scored by the number of innings and by multiplying by nine.

The ERA is also somewhat influenced by the ball park where a pitcher plays half his game, as well as the hometown's official scorers tend to assign errors to dramas instead of base hits, which can be either. The first known use of the earned run average was made in 1947.