Batting Average Calculator

About This Tool

The Batting Average Calculator computes the most important offensive statistics in baseball and softball. Enter your raw hitting numbers to get batting average (BA), on-base percentage (OBP), slugging percentage (SLG), and OPS, complete with performance ratings based on MLB standards.

Batting Average vs. On-Base Percentage

While batting average has been the traditional measure of hitting ability since the 1870s, modern analytics favor on-base percentage as a more complete measure. OBP accounts for walks and hit-by-pitches, which have the same value as a hit in terms of not making an out. A player who draws many walks contributes more to their team than their batting average alone suggests. The “Moneyball” revolution in baseball was built partly on the insight that OBP was undervalued relative to batting average.

Understanding Slugging Percentage

Slugging percentage measures batting power by weighting extra-base hits. A single is worth 1 total base, a double 2, a triple 3, and a home run 4. Dividing total bases by at-bats gives SLG. A player who hits 30 home runs and many doubles will have a much higher SLG than a contact hitter with similar batting average. SLG captures the run-producing value of extra-base hits that batting average treats identically to singles.

OPS: The Combined Metric

OPS simply adds OBP and SLG together. Despite its simplicity, OPS correlates strongly with run production and is widely used in modern baseball analysis. An OPS above .900 is All-Star caliber, above .800 is a quality starter, and the league average typically falls around .710-.750. While more advanced metrics like wOBA and wRC+ exist, OPS remains the most accessible combined batting statistic.