Baseball On Base Plus Slugging (OBPS) Calculator

OBPS Calculator


What is On Base Plus Slugging (OBPS)?

On Base Plus Slugging (OBPS) is a baseball metric used to combine a batter’s number of hits with their slugging percentage.
It is intended to give a balanced perspective between the two statistics – on base percentage does not take account the quality of each hit (how many bases it earned), while slugging percentage focuses on the quality of each hit, but does not show the odds of a hit happening (which puts a player on base and avoids an out).
Critics of OBPS note that the while OBP and SLG are given equal weight in the metric, OBP is generally considered to be a more important part of the equation (as much as 4 times more important) when weighting is considered (the Gross Production Average metric was built with the intention of better dealing with this metric). As well, the OBPS metric often produces a number that is difficult to understand to the general sports fan who is often used to seeing Batting Average statistics.

How to calculate OBPS

In Baseball, on base plus slugging (OBPS) is calculated by adding On Base Percentage (OBP) and Slugging Percentage (SLG) together.
On Base Plus Slugging = On Base Percentage + Slugging Percentage


If a batter has an on base percentage of 0.295 and a slugging average of 0.386, then:
OBPS = 0.295 + 0.386
OBPS = 0.681
Therefore, the batter’s OBPS is 0.681.

What is On Base Percentage?

On base percentage measures the number of times a batter gets on base in relation to their number of at bats.

What is slugging percentage?

Slugging percentage measures the total number of bases earned in relation to the player’s number of at bats.