Wins Above Replacement (WAR) is a catchall statistic that translates every facet of a player’s contribution into the common language of team victories.
By converting runs created, saved, and replaced into wins, WAR lets you compare stars across eras, positions, and ballparks with a single figure.
Enter a player’s run totals or a pre calculated Runs Above Replacement value below and instantly learn how many extra wins that player added to the roster.
WAR Calculator FAQ
What is WAR?
WAR, or Wins Above Replacement, estimates how many additional wins a player provides compared with an easily available replacement.
Why do I divide by Runs Per Win?
Run values are converted to wins because roughly a fixed number of runs translate into one team victory.
Dividing by Runs Per Win finishes that conversion.
What should I use for Runs Above Replacement?
You may total batting, pitching, fielding, and positional runs, or simply copy the RAR figure published by sites like FanGraphs or Baseball-Reference.
Is 10 always the correct Runs Per Win value?
Ten is a league average estimate.
Run environments can move, so some analysts prefer 9.5 to 10.5 depending on the season.
Can I calculate WAR for pitchers?
Yes.
As long as you input the pitcher’s Runs Above Replacement and an appropriate Runs Per Win value, the math is identical.