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Baseball Walks per 9 Innings (BB/9) Calculator

BB/9 Calculator

1.913

What is Walks per 9 Innings (BB/9)?

BB/9 is a baseball pitching metric that shows how frequently a pitcher walks batters.
A lower BB/9 is generally considered better, as it means that the pitcher walks fewer batters for each inning pitched.

How to calculate BB/9

In Baseball, on Walks per 9 innings is calculated as:
BB/9 = 9 x (Walks / (Innings Pitched + (Outs (Partial Innings) Pitched / 3))

Example

If a pitcher has allowed allowed 43 walks over 202 innings and 1 out, then:
BB/9 = 9 x (43 / (202 + (1 / 3))
BB/9 = 9 x (43 / 202.333333)
BB/9 = 9 x 0.2152
BB/9 = 1.913
Over an average of 9 innings, this pitcher will have walked 1.913 batters.