On Base Percentage
Calculator
Results
- On-base percentage (OBP)
- 0.357142
- Times on base
- 225
- Plate appearances counted
- 630
Sport statistics results
| On-base percentage (OBP) | 0.357142 |
| Times on base | 225 |
| Plate appearances counted | 630 |
formula-map diagram
- On-base percentage (OBP)
- 0.357142
- Times on base
- 225
- Plate appearances counted
- 630
Formula breakdown
Formula
OBP = (H + BB + HBP) ÷ (AB + BB + HBP + SF)= 0.35714285714286
Note
Simplified model: these are the standard published statistics computed from the numbers you enter. They ignore park factors, opponent strength, playing conditions and league adjustments, so results are indicative only and not an official rating.
More in Sport statistics
See all →Frequently asked questions
What does on-base percentage measure that batting average doesn't?+
On-base percentage (OBP) measures how often a batter reaches base by any means, including hits, walks, and hit-by-pitches, not just hits. This captures a batter's overall ability to avoid making an out, which is the fundamental job of a hitter.
What is the OBP formula?+
OBP = (hits + walks + hit-by-pitches) / (at-bats + walks + hit-by-pitches + sacrifice flies). The denominator includes all the plate appearances that could plausibly result in reaching base, while excluding sacrifice bunts, which are treated as an intentional out.
Why is OBP considered more valuable than batting average by many analysts?+
Since outs are the scarcest resource in an inning (a team gets only 27 in a standard game), any statistic that better measures how often a hitter avoids making an out closely tracks their real offensive contribution. Sabermetric research consistently shows OBP correlates more strongly with run scoring than batting average.
What is a good OBP value?+
League-average OBP in modern MLB hovers around .320, an OBP above .370 is considered very good, and elite hitters can post OBPs above .400. Because OBP includes walks, a lower batting average can still come with a strong OBP if the batter draws a lot of walks.
Why are sacrifice flies included but sacrifice bunts excluded from the denominator?+
A sacrifice fly still represents a real batted-ball outcome that could have produced a hit, so it's included as a plate appearance charged against OBP. A sacrifice bunt is treated as an intentional strategic out, not reflective of the batter's ability to reach base, so it's excluded entirely from the calculation.