Run Average (RA)

LAST UPDATE: September 15th, 2020

Run Average (RA) Calculator

What is Run Average?

Run average is the number of runs allowed per inning pitched. Compared with ERA, it includes all runs against (including unearned runs).

A lower run average is seen as a better.

While it is primarily a pitching metric, it can also be used to evaluate a team’s defensive performance as a whole.

Formula – How to calculate Run Average

RA = Innings per Regulation Game x (Runs ÷ (Innings Pitched + (Outs (Partial Innings) Pitched / 3))


A pitcher has 69 runs allowed across 202 innings and 1 out pitched. The league they play in has a regulation time of 9 innings.
RA = 9 x (69 ÷ 202.333333)
RA = 9 x 0.3410
RA = 3.069
This pitcher’s run average 3.069, or an average of 3.069 runs allowed per 9 innings of play.

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