Case 1
- At-bats (AB)
- 500
- Singles (1B)
- 100
- Doubles (2B)
- 30
- Triples (3B)
- 5
- Home runs (HR)
- 25
0.550
Open with these valuesSlugging Percentage Calculator
0.550
Result: 0.550Total bases divided by at-bats. A single counts one, a double two, a triple three and a home run four, so 100 singles, 30 doubles, 5 triples and 25 home runs in 500 at-bats make 275 bases and a .550 slugging percentage. Walks are not at-bats and do not appear anywhere in it.
The numbers at a glance
Held fixed: At-bats (AB) 500, Singles (1B) 100, Doubles (2B) 30, Triples (3B) 5.
| Home runs (HR) | Result |
|---|---|
| 0 | 0.350 |
| 10 | 0.430 |
| 20 | 0.510 |
| 25Your value | 0.550 |
| 30 | 0.590 |
| 40 | 0.670 |
| 50 | 0.750 |
Worked examples
Case 2
- At-bats (AB)
- 400
- Singles (1B)
- 90
- Doubles (2B)
- 20
- Triples (3B)
- 2
- Home runs (HR)
- 15
0.490
Open with these valuesCase 3
- At-bats (AB)
- 10
- Singles (1B)
- 5
- Doubles (2B)
- 0
- Triples (3B)
- 0
- Home runs (HR)
- 0
0.500
Open with these valuesHow it's calculated
SLG = (1B + 2×2B + 3×3B + 4×HR) ÷ AB
- StepEnter the at-bats for the player and the span you care about.
- StepEnter the hits split by type — singles, doubles, triples and home runs, not the hit total.
- ResultRead the slugging percentage; it is bases per at-bat, so it can exceed 1.000.
What this number means
Not a percentage — it can reach 4.000
It is bases per at-bat, so a hitter with a home run in every at-bat sits at 4.000. Four home runs in four at-bats are 16 total bases and exactly that figure.
Walks do not appear in it at all
A walk is not an at-bat, so it changes neither the total bases on top nor the at-bats underneath. That is why slugging is paired with on-base percentage, which does credit walks, to form OPS.
Split the hits by type, not the hit total
Every hit is weighted by the bases it earns — one, two, three or four. The default line has 160 hits but 275 total bases, so entering them all as singles would understate it badly.
Commonly misread
Slugging percentage cannot go above 1.000.
It is a rate of bases per at-bat, not a share capped at one hundred. Four home runs in four at-bats give 4.000.
Slugging and batting average measure the same thing.
Batting average treats every hit alike, slugging weights it by bases. The two coincide only for a hitter with nothing but singles.
Bases taken on a walk, a steal or an error count too.
Only the bases earned on hits count toward the numerator. Walks, hit-by-pitches, steals and errors are all left out.
Reference table
| AB, 1B, 2B, 3B, HR | Total bases | SLG |
|---|---|---|
| 10, 0, 0, 0, 0 | 0 | 0.000 |
| 10, 5, 0, 0, 0 | 5 | 0.500 |
| 3, 1, 1, 0, 0 | 3 | 1.000 |
| 4, 0, 0, 0, 4 | 16 | 4.000 |
| 400, 90, 20, 2, 15 | 196 | 0.490 |
| 500, 120, 25, 3, 10 | 219 | 0.438 |
| 500, 100, 30, 5, 25 | 275 | 0.550 |
| 600, 130, 40, 4, 40 | 382 | 0.637 |
Questions
How do I calculate slugging percentage?
Add up total bases — singles once, doubles twice, triples three times, home runs four times — then divide by at-bats. A hitter with 100 singles, 30 doubles, 5 triples and 25 home runs in 500 at-bats has 275 total bases, so slugging is 275 ÷ 500 = .550.
How is slugging different from batting average?
Batting average is hits ÷ at-bats and treats every hit the same. Slugging is total bases ÷ at-bats, so a home run counts four times a single. Two players can share a batting average and slug far apart if one hits for more power — they only coincide for a hitter with nothing but singles.
What counts as total bases?
The bases earned on hits: one for a single, two for a double, three for a triple and four for a home run. Walks, hit-by-pitches and bases taken on errors or steals do not count. Total bases are the numerator of slugging percentage.
What is a good slugging percentage?
League-average slugging usually sits near .400, above .500 marks a strong power hitter, and the very best seasons push past .600. The theoretical maximum is 4.000, which would mean a home run in every at-bat.
Can slugging percentage be more than 1.000?
Yes. Each hit can be worth up to four bases, so the figure is a rate of bases per at-bat, not a percentage capped at one hundred. A short streak of home runs can push it well above 1.000, though full-season marks rarely top .800.
Do walks affect slugging percentage?
No. A walk is not an at-bat, so it appears in neither the numerator nor the denominator. That is why slugging is paired with on-base percentage, which does credit walks, to form OPS.
Sources and last check
Information, not professional advice.