Enter the total number of hits, walks, times hit by pitch, at-bats, and sacrifice flies into the calculator. The calculator will evaluate and display the true on-base percentage.

## On Base Percentage Formula

The following equation is used to calculate a true on-base percentage.

OB% = (H + W + HBP) / (AB + W + HBP + SF)

• Where OB% is the on-base percentage
• H is the total number of hits
• w is the total number of walks
• AB is the number of at-bats
• HBP is the total number of hits by pitch
• SF is a sacrifice fly

## What is on-base percentage?

On-base percentage (OBP) is a statistic used in baseball to measure a batter’s ability to reach base safely. It calculates the ratio of times a batter reaches base (hits, walks, hit by pitch) to their total plate appearances, excluding instances of fielder’s choice, errors, or sacrifices.

OBP is vital because it provides a comprehensive evaluation of a batter’s overall performance in getting on base.

Unlike batting average, which only considers hits, OBP considers all successful attempts to reach base and rewards batters for their ability to draw walks and avoid outs. It reflects a batter’s patience, discipline, and ability to contribute positively to their team’s success.

A high OBP indicates a batter who frequently reaches base, putting their team in a better position to score runs.