Sports
Baseball Performance Calculator
Calculate AVG, OBP, SLG, OPS, ISO, and total bases from a complete batting line with a live base-production diamond.
Batting line laboratory
Convert plate-appearance outcomes into a complete slash line
Singles are derived from hits after extra-base hits are removed; total bases then drive slugging and isolated power.Base-value map
Hit distribution around the diamond
Detailed calculation process
Derive missing outcomes before calculating rate statistics
General formulas
1B = H − 2B − 3B − HRTB = 1B + 2(2B) + 3(3B) + 4(HR)AVG = H / ABOBP = (H + BB + HBP) / (AB + BB + HBP + SF)SLG = TB / ABOPS = OBP + SLGISO = SLG − AVGSymbols and units
Worked substitution with the current batting line
Outcome reconciliation
Hits, bases, and rate contribution
| Outcome | Count | Bases each | Total bases | Share of hits |
|---|
Practical examples
Use cases
- Reconcile a player’s game log to the published slash line.
- See how exchanging singles for extra-base hits changes SLG while AVG stays fixed.
- Measure how walks and hit-by-pitches raise OBP without changing batting average.
Data quality
Validation rules
- Hits cannot exceed at-bats.
- Doubles + triples + home runs cannot exceed total hits.
- Official scoring rules determine whether an event is a hit, error, sacrifice, or fielder’s choice.
Limitations
OPS is intentionally simple and does not adjust for park, league, era, opponent, base-running, or defensive value. The calculator does not include sacrifice bunts, interference, reached-on-error events, or catcher interference in plate appearances because the entered fields do not identify them.
Baseball performance FAQ
Why can OBP be higher than batting average?
OBP adds walks and hit-by-pitches to times on base while batting average uses hits divided by at-bats.
Why is a home run worth four total bases?
Slugging weights each hit by the number of bases credited: one through four.
Is OPS a percentage?
No. It is the sum of two rates, OBP and SLG, and is conventionally displayed to three decimals.
Reference definitions: MLB standard-stat glossaries for on-base percentage, slugging percentage, and OPS.