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Range Factor (RF)

LAST UPDATE: September 24th, 2020

RF Calculator

Definition – What is Range Factor?

RF is a fielding metric. It is the number of outs and assists per 9 innings. A higher RF means the fielder produces more outs and assists per game.

RF is best at comparing specific positions (1st base vs. 1st base players, left fielders vs. left fielders, etc.). Comparison between different positions is difficult.

Formula – How to calculate Range Factor

RF = (Standard Innings per Game x (Putouts + Assists)) ÷ (Innings Played + (Outs (Partial Innings) Played ÷ 3))

Example

A fielder has 190 putouts and 43 assists over 202 1/3 innings. The league they play in has 9 innings as regulation length for a game.
RF = (9 x (190 + 43)) ÷ (202 + (1 / 3))
RF = (9 x (190 + 43)) ÷ (202 + (1 / 3))
RF = (9 x 233) ÷ 202.333333
RF = 2097 ÷ 202.333333
RF = 10.36
This fielder’s range factor would be 10.36, or an average of 10.36 outs and assists per 9 innings of play.

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