Baseball Stats Calculator
Calculate batting average, on-base percentage, slugging percentage, and OPS from at-bats, hits, walks, and home runs.
Get a full offensive stat breakdown.
Baseball batting statistics quantify a hitter’s performance using several complementary metrics. Batting Average (AVG), On-Base Percentage (OBP), and Slugging Percentage (SLG) are the three core statistics that together form OPS — one of the most comprehensive single-number performance indicators in baseball.
Batting Average (AVG): AVG = Hits ÷ At-Bats
On-Base Percentage (OBP): OBP = (Hits + Walks + Hit by Pitch) ÷ (At-Bats + Walks + Hit by Pitch + Sacrifice Flies)
Slugging Percentage (SLG): SLG = Total Bases ÷ At-Bats Where Total Bases = (1B × 1) + (2B × 2) + (3B × 3) + (HR × 4)
OPS (On-base Plus Slugging): OPS = OBP + SLG
Where:
- H = total hits; BB = walks (base on balls); HBP = hit by pitch; SF = sacrifice flies
- AB = at-bats (plate appearances minus walks, HBP, sacrifices)
- 1B, 2B, 3B, HR = singles, doubles, triples, home runs
OPS performance scale:
- Below .650: Poor
- .650–.699: Below average
- .700–.749: Average
- .750–.799: Above average
- .800–.849: Good
- .850–.899: Great
- .900–.999: Excellent
- 1.000+: Elite (all-time great season)
Worked example: Player stats for a season: 520 AB, 158 H, 30 2B, 5 3B, 22 HR, 65 BB, 4 HBP, 3 SF.
- Singles = 158 − 30 − 5 − 22 = 101
- Total Bases = (101×1) + (30×2) + (5×3) + (22×4) = 101 + 60 + 15 + 88 = 264
- AVG = 158 ÷ 520 = .304
- OBP = (158 + 65 + 4) ÷ (520 + 65 + 4 + 3) = 227 ÷ 592 = .383
- SLG = 264 ÷ 520 = .508
- OPS = .383 + .508 = .891: a great season by any measure.
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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