Batting Average Calculator
Calculate baseball batting average (H/AB), OBP, slugging, and OPS from hits, at-bats, walks, and extra-base hits.
Compare to MLB benchmarks by position.
Baseball batting statistics quantify a hitter’s effectiveness at the plate. The three most fundamental offensive metrics are Batting Average (BA), On-Base Percentage (OBP), and Slugging Percentage (SLG). Together they tell the complete story of a batter’s value.
Batting Average (BA):
BA = Hits (H) ÷ At Bats (AB)
At Bats exclude walks, hit-by-pitch, sacrifice flies, and sacrifice bunts — only official plate appearances where the batter tries to get a hit count.
On-Base Percentage (OBP):
OBP = (H + BB + HBP) ÷ (AB + BB + HBP + SF)
- BB = walks (base on balls)
- HBP = hit by pitch
- SF = sacrifice flies
Slugging Percentage (SLG):
SLG = Total Bases ÷ At Bats
Total Bases = (1B × 1) + (2B × 2) + (3B × 3) + (HR × 4)
OPS (On-base Plus Slugging):
OPS = OBP + SLG
OPS is considered one of the best simple predictors of overall offensive production.
Worked example: A batter has: 162 AB, 52 H (38 singles, 9 doubles, 2 triples, 3 HR), 20 BB, 3 HBP, 2 SF
- BA = 52 ÷ 162 = .321
- OBP = (52 + 20 + 3) ÷ (162 + 20 + 3 + 2) = 75 ÷ 187 = .401
- Total Bases = (38×1) + (9×2) + (2×3) + (3×4) = 38+18+6+12 = 74
- SLG = 74 ÷ 162 = .457
- OPS = .401 + .457 = .858
MLB benchmarks:
| Metric | Poor | Average | Good | Elite |
|---|---|---|---|---|
| BA | < .230 | .255 | .290 | .320+ |
| OBP | < .300 | .330 | .360 | .400+ |
| SLG | < .360 | .420 | .480 | .550+ |
| OPS | < .680 | .750 | .850 | .950+ |
How we build and check this calculator
This calculator runs entirely in your browser, so the numbers you enter stay on your device. The math behind it is written by hand and tested against worked examples and standard references before the page goes live.
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