By Zencalcy Editorial TeamLast reviewed About us
Slugging percentage weights each hit by its base value, so a home run counts four times as much as a single. The calculator totals those bases and divides by at-bats.
Weight every hit by the bases it earns.
TB = 1B + 2×2B + 3×3B + 4×HR SLG = TB ÷ AB
SLG is not a percentage in the usual sense and can exceed 1.000, because total bases can be larger than at-bats. It measures power, while batting average treats every hit equally.
| Symbol | Meaning |
|---|---|
| 1B | Singles, worth one total base each. |
| 2B | Doubles, worth two total bases each. |
| 3B | Triples, worth three total bases each. |
| HR | Home runs, worth four total bases each. |
| AB | At-bats, the denominator of slugging percentage. |
| TB | Total bases, the weighted sum of all hits. |
20 singles, 8 doubles, 2 triples, and 5 home runs give 20 + 16 + 6 + 20 = 62 total bases. Dividing 62 by 150 at-bats gives a slugging percentage of 0.413.
Slugging percentage uses total bases, not hits, in the numerator. A single is worth one base, a double two, a triple three, and a home run four, so slugging is total bases divided by at bats. Because the denominator is at bats rather than plate appearances, walks do not appear anywhere in the formula.
That design makes slugging a measure of raw power per at bat. A hitter who collects four singles in four at bats and one who hits four home runs in four at bats post the same batting average, but slugging separates them sharply, at 1.000 from the singles against 4.000 from the home runs.
Slugging ignores walks, so a patient power hitter who is pitched around gets no credit for the on base value of those free passes. It also counts a single and a walk differently even though each normally advances a runner only one base, and it does not account for when hits occur relative to runners on base.
Continue with the Strikeout to Walk Ratio Calculator, WHIP Calculator, or the BABIP Calculator — or browse more baseball tools and all sports calculators.
Yes. A home run gives four bases from one at-bat, so a hitter with enough extra-base hits can have more total bases than at-bats.
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Last reviewed: September 2026. See how we build and check every tool on the about page.
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Content updated: September 2026