On-Base Percentage Calculator
Calculate on-base percentage (OBP) from hits, walks, hit-by-pitch, and at-bats.
On-Base Percentage (OBP)
Times On Base (H + BB + HBP)
What On-Base Percentage Measures
On-base percentage (OBP) measures how often a batter reaches base per plate appearance, counting hits, walks, and being hit by a pitch. Unlike batting average, which only credits hits, OBP rewards a hitter's ability to avoid making outs and get on base by any means.
The Formula
- OBP = (H + BB + HBP) / (AB + BB + HBP + SF)
- H = Hits, BB = Walks (Bases on Balls)
- HBP = Hit By Pitch, SF = Sacrifice Flies
- AB = At Bats
Why OBP Beats Batting Average
Batting average ignores walks and hit-by-pitches, so two players with the same average can have very different real value. A patient hitter who draws many walks reaches base more often and creates more scoring opportunities. Because avoiding outs is the most important thing a hitter can do, OBP correlates more strongly with run scoring than batting average does.
Typical OBP Ranges
- .400+ - Excellent (Elite)
- .360-.399 - Great
- .330-.359 - Above Average
- .320-.329 - Average
- .310-.319 - Below Average
- Below .310 - Poor