Slugging Percentage Calculator
Calculate slugging percentage from total hits and extra-base hit counts, with derived singles, total bases and a three-decimal rate.
Calculate slugging percentage by giving different hit types their base values. Enter total hits together with doubles, triples and home runs; the tool derives singles so you do not need to type the same total twice. The breakdown shows both the hit count and bases contributed by each category.
How to use this tool
- Use official scoring counts from one consistent period.
- Enter whole-number totals; include home runs in total hits.
- Check that the entered counts agree with your scorebook.
- Read the conventional display and inspect the supporting counts.
Formula
1B = H − 2B − 3B − HR; TB = 1B + 2×2B + 3×3B + 4×HR; SLG = TB / AB
Total bases here come from hits only. Walks, steals, errors and advancement after the hit do not add to TB. Extra-base hits must fit within total hits, which must fit within at-bats.
Example
For 30 hits in 100 at-bats, including 5 doubles, 2 triples and 3 home runs, singles are 20. Total bases are 20 + 10 + 6 + 12 = 48, giving slugging .480.
Reading the result
A rounded rate summarizes the supplied sample. This page does not determine championship eligibility or account for opponent quality. Keep numerator and denominator totals when combining records instead of combining rounded display values.
Frequently asked questions
Why can slugging exceed 1.000?
Its numerator is bases, not just hits. One home run in one at-bat contributes four bases and gives 4.000. Despite the traditional name, it is not a probability.
Do I include home runs in total hits?
Yes. Total hits includes all four hit types. Enter each extra-base category separately so the calculator can subtract it to derive singles.
Does a stolen base increase slugging?
No. The count describes bases credited by the hit itself. Running and later advancement require other statistics, even when they contribute substantially to scoring.
Sources
Last updated: 2026