MasterTool

Slugging Percentage Calculator

Calculate slugging percentage and isolated power from singles, doubles, triples and home runs.

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What this tool does

Calculate slugging percentage and isolated power from singles, doubles, triples and home runs. Walks, hit-by-pitches and sacrifices are not at bats and add no total bases.

How to use the Slugging Percentage Calculator

  1. Enter or select at bats.
  2. Enter or select singles.
  3. Enter or select doubles.
  4. Enter or select triples.
  5. Enter or select home runs.
  6. Read the calculated result; change any measurement to compare alternatives.

Formula

total bases = singles + 2×doubles + 3×triples + 4×home runs; SLG = total bases ÷ at bats; ISO = SLG − batting average
ab
At bats
singles
Singles
doubles
Doubles
triples
Triples
hr
Home runs

Walks, hit-by-pitches and sacrifices are not at bats and add no total bases.

Worked example

For slugging percentage calculator, the following measurements illustrate the exact method: At bats: 500; Singles: 90; Doubles: 30; Triples: 3; Home runs: 25.

Inputs

  • At bats500
  • Singles90
  • Doubles30
  • Triples3
  • Home runs25

Result

  • Slugging percentage (SLG)0.52
  • Total bases259
  • Hits148
  • Batting average0.3
  • Isolated power (ISO)0.22

Results explained

Slugging percentage (SLG)
Slugging percentage (SLG) from the formula above. Walks, hit-by-pitches and sacrifices are not at bats and add no total bases.
Total bases
Total bases from the formula above. Walks, hit-by-pitches and sacrifices are not at bats and add no total bases.
Hits
Hits from the formula above. Walks, hit-by-pitches and sacrifices are not at bats and add no total bases.
Batting average
Batting average from the formula above. Walks, hit-by-pitches and sacrifices are not at bats and add no total bases.
Isolated power (ISO)
Isolated power (ISO) from the formula above. Walks, hit-by-pitches and sacrifices are not at bats and add no total bases.

Frequently asked questions

League average is around .400–.420. Sluggers post .500+, and .600+ is a historic power season. Light-hitting positions can survive near .350 if the on-base skills are strong.

Batting average counts each hit once. Slugging weights hits by bases, up to 4 for a home run, so its ceiling is 4.000 — a player who homered every at bat would slug 4.000 while batting 1.000.

ISO = SLG − AVG strips out singles, leaving only extra-base impact. .140 is about average, .200+ is real power, and below .100 marks a contact-first hitter.

No — walks are not at bats and earn no total bases, so they leave SLG unchanged. They raise OBP (and therefore OPS) instead.

Total bases is a counting total that grows with playing time; slugging divides it by at bats, making it a rate stat you can compare between a part-time and everyday player.