Slugging Percentage Calculator โ SLG, ISO, Total Bases
Calculate slugging percentage (SLG), isolated power (ISO), and total bases. Compare to Barry Bonds, Babe Ruth, and MLB legends.
Slugging Percentage โ Measure Raw Power
Total bases per at-bat. From Babe Ruth to Shohei Ohtani.
Legendary SLG Seasons โ Click to Load
Hit Breakdown
Screenshot Summary
Player: SLG 0.536 | TB 295 | ISO 0.209 | Tier Very Good.
SLG vs Benchmarks
For educational and informational purposes only. Verify with a qualified professional.
Answer Capsule
SLG = TB / AB where TB = 1B + 2ร2B + 3ร3B + 4รHR. It measures power by weighting extra-base hits. A .500 SLG means half a total base per at-bat. Barry Bonds holds the all-time record at .863 in 2001, while Babe Ruth's career .690 SLG has stood for nearly a century.
Key Takeaways
- A home run contributes 4 total bases โ four times the value of a single.
- ISO (Isolated Power) strips away singles to measure pure extra-base power.
- SLG doesn't account for walks, so pair it with OBP for OPS.
- The league average SLG has hovered around .400-.420 in recent years.
Did You Know?
How It Works
Total bases weights each hit type. Singles count as 1, doubles as 2, triples as 3, home runs as 4. Divide by at-bats for slugging percentage.
Expert Tips
Combine with OBP
OPS (OBP + SLG) gives a complete offensive picture. Both are equally important.
Use ISO for Power
ISO = SLG - BA. It isolates extra-base power from singles.
Context by Era
Dead-ball era had lower SLG. Compare within era for fairness.
1.000+ Legendary
A 1.000+ SLG season is nearly impossible โ only in historic years.
Comparison Table
| SLG Range | Tier | Example |
|---|---|---|
| .600+ | Elite | Barry Bonds, Babe Ruth |
| .500โ.600 | Very Good | Mike Trout, Mookie Betts |
| .450โ.500 | Above Average | Most All-Stars |
| .400โ.450 | Average | League average hitter |
| Below .400 | Below Average | Light-hitting utility |
Infographic Stats
Official Sources
Disclaimer: SLG is one component of offensive value. For a complete picture, consider OPS (OBP + SLG), wOBA, or wRC+. This calculator uses standard MLB formulas.