Batting Average Calculator: AVG, OBP, SLG and OPS

How it works

AVG = H ÷ AB · OBP = (H + BB + HBP) ÷ (AB + BB + HBP + SF) · Total bases = 1B + 2×2B + 3×3B + 4×HR · SLG = TB ÷ AB · OPS = OBP + SLG · ISO = SLG − AVG · Straight hits to reach target T = ⌈(T × AB − H) ÷ (1 − T)⌉

Batting average counts only official at-bats. Walks, hit-by-pitches, sacrifice bunts, sacrifice flies and catcher’s interference are not at-bats, so a patient hitter’s value shows up in on-base percentage instead. OBP adds walks and hit-by-pitches to the hits and counts sacrifice flies in the denominator; it measures how often a batter avoids making an out. Slugging percentage weights each hit by the bases it gains (a home run counts four), and OPS adds OBP and SLG into one quick measure of overall hitting. Averages are written to three decimals without the leading zero (.285), and each .001 is called a point. The target section solves how many hits in a row you need to lift your average to a goal such as .300, or how many hitless at-bats you can absorb before dropping below it. League figures are the 2026 MLB totals from Baseball-Reference: a .244 batting average, .318 OBP, .400 SLG and .719 OPS.

Worked example

57 hits in 200 at-bats is 57 ÷ 200 = .285, a hit every 3.51 at-bats and 41 points above the 2026 MLB average of .244. With no walks or sacrifice flies entered, OBP is also .285. To reach .300 the hitter needs (0.300 × 200 − 57) ÷ 0.7 = 4.29, so 5 straight hits, which gives 62 for 205 = .302. Going 1 for 4 next game would drop the average to .284; 2 for 4 would lift it to .289. Adding 20 walks, 3 hit-by-pitches and 2 sacrifice flies gives OBP = 80 ÷ 225 = .356.

Sources: Baseball-Reference: MLB batting year-by-year averages (2026 season) · Wikipedia: Batting average (definition, rounding, Ted Williams 1941, qualification rule) · Wikipedia: On-base percentage (formula, exclusions, Bonds 2004 record)

Frequently asked questions