Batting Average Calculator

AVG, OBP, and SLG from hits, at-bats, walks, and power.

What it does

Baseball compresses hitting into three decimals: average for hit rate, on-base for reaching safely by any means, and slugging for power per at-bat. Together they describe contact, patience, and punch better than any one alone.

The tool above takes hits, at-bats, extra base splits, walks, hit by pitches, and sacrifice flies. It returns AVG, OBP, and SLG in classic dot three hundred style.

The default of 150 hits in 500 at-bats with 30 doubles, 5 triples, 20 homers, 60 walks, 5 hit batters, and 4 sac flies reads .300 / .378 / .500: a strong all around line near star level.

Formulas follow the official MLB glossary (AVG = H/AB, SLG from total bases) with ESPN stat references matching OBP. Both exclude walks from at-bats while counting them in on-base chances.

How to use

1. Enter hits and at-bats first.
2. Split extra base hits into doubles, triples, homers.
3. Add walks, hit by pitches, and sac flies.
4. Read AVG first for pure hit rate.
5. Read OBP and SLG for patience and power.

Formula

AB

At-bats: plate trips minus walks, HBP, sacrifices.

TB

Total bases weighting each hit by bags.

OBP

Safe arrival rate across all chances.

Extra base hits cannot pass total hits; the page rejects such splits. Display drops the leading zero by baseball custom (.300, never 0.300).

Worked example

Reference table

Limits

• Rate stats only; playing time and defense sit outside.
• Small samples swing wildly; hundreds of trips stabilize.
• Park and era shift meaning across seasons.
• Walks counted in OBP but never in AVG by rule.

Common mistakes

• Dividing by plate appearances instead of at-bats.
• Counting walks as hits or at-bats.
• Reading SLG as a percent instead of bases per at-bat.
• Comparing across eras without adjusting.
• Trusting April splits as true talent.

Try it yourself

Quick checks. Answers sit tucked under each question.

Questions

Sources

• MLB glossary: AVG
• ESPN stats glossary

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