BasicHitting
SLG
Slugging Percentage
Total bases per at-bat. A single counts as 1, a double 2, a triple 3 and a home run 4.
.4002026 MLB average (2025: .404)
Simple explanation
Batting average counts a single and a home run the same: one hit. Slugging adds up how many bases each hit was worth. A hitter with one home run in 10 at-bats is batting .100 but slugging .400.
Despite the name, it isn't really a percentage. It's average bases per at-bat, so it can go above 1, and in theory as high as 4.000, a home run every time up.
Benchmarks
- .359
- Bottom 10%
- .427
- Median
- .500
- Top 10%
Distribution of the 135 qualified hitters in 2026. Qualified hitters are mostly regulars, so the median sits above league average.
Detailed explanation
SLG = (1B + 2×2B + 3×3B + 4×HR) ÷ AB
- 1B
- singles
- 2B
- doubles
- 3B
- triples
- HR
- home runs
- AB
- at-bats (walks, hit by pitch and sacrifices excluded)
Walks and hit-by-pitches aren't in it at all. OBP tells you how often a hitter gets on, slugging how far he goes when he hits, so the two fill each other's gaps.
Treating a double as exactly two singles and a homer as four doesn't match run values. In terms of runs, a double is worth less than two singles and a home run less than four. It's still easy to compute and good enough for a rough read on power, so it shows up everywhere.
Subtract batting average from slugging and you're left with power alone, singles stripped out. That's ISO.