Knowing how often a batter reaches base is crucial when analyzing baseball performance.
On Base Percentage, often shortened to OBP, blends hits, walks, and hit-by-pitch events to reveal a player’s true table-setting ability.
Use the quick calculator below to enter simple stat lines and instantly see an accurate, three-decimal OBP.
Whether you coach, play fantasy, or simply love the numbers, this tool keeps evaluation fast and clear.
Frequently Asked Questions
What stats do I need to calculate OBP?
You only need hits, walks, hit by pitches, at bats, and sacrifice flies.
Those five numbers fully cover the official formula.
What is a good OBP in baseball?
A season-long OBP above .340 is considered solid, while anything north of .370 is outstanding.
League context can push those benchmarks slightly up or down.
Why are sacrifice flies included in the denominator?
The sacrifice fly counts as an opportunity to reach base, so including it prevents hitters who often lift productive fly balls from being rewarded with an inflated OBP.
Does reaching on error count toward OBP?
No. Reaching on an error is not a hit or a walk, so it has no effect on either the numerator or denominator of OBP.
How precise should OBP be reported?
Major league statistics traditionally show OBP to three decimal places, such as .363.
Using three places keeps numbers comparable while avoiding false precision.