⚾ Slugging Percentage (SLG) Calculator
Calculate slugging percentage from total bases and at-bats.
Slugging Percentage Formula
SLG = (1B + 2×2B + 3×3B + 4×HR) / AB
SLG Standards
.500+: Elite / .400-.499: Excellent / .350-.399: Average / Below .350: Poor
Worked examples
A contact hitter with 120 singles, 25 doubles, 5 triples and 5 home runs in 500 at-bats has 205 total bases, so SLG is .410.
A power hitter with 80 singles, 25 doubles, 2 triples and 40 home runs in 500 at-bats reaches 296 bases, SLG .592.
What the value assumes
SLG counts bases rather than hits, so a home run is worth four singles. Walks and hit-by-pitch are ignored entirely, which is why it is read next to OBP, and at-bats exclude walks and sacrifice flies. Small samples move violently: two home runs in April can shift SLG by 40 points.
Frequently asked questions
- What is a good slugging percentage?
- League average is around .400; .450 is above average, .500 excellent and .550 or more is elite power. The best single seasons exceed .700.
- What does OPS mean?
- It is OBP plus SLG. Around .800 is solid and .900 excellent, which is why OPS is popular: one number covers both getting on base and hitting for power.
- Are walks really ignored?
- Yes. A walk adds no bases to the numerator and does not count as an at-bat, so SLG treats it as if nothing happened — the opposite of OBP.