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All calculatorsMethodology

Slugging Percentage Calculator

Calculate slugging percentage (SLG) from singles, doubles, triples and home runs, plus total bases, batting average, ISO, on-base percentage and OPS.

Interactive calculator · Method SLUGGING-PERCENTAGE-1.0 · Last reviewed: 2026-11-04

Calculate your scenario

Total bases = 1B + 2 × 2B + 3 × 3B + 4 × HR.

Your inputs

Try an example

Default worked example. Edit the inputs to calculate your scenario.

Default worked example

Slugging percentage (SLG) .453
Total bases 249
Batting average (AVG) .278
Isolated power (ISO) .175
On-base percentage (OBP) .342
OPS (OBP + SLG) .794

SLG = (100 + 2×30 + 3×3 + 4×20) ÷ 550 at-bats = 249 ÷ 550 = .453; OBP = 208 ÷ 609 = .342.

How to use the calculator

Enter singles, doubles, triples and home runs, then at-bats that did not produce a hit (at-bats minus hits). Add walks, hit-by-pitch and sacrifice flies for OBP and OPS.

What the result means

With 153 hits for 249 total bases in 550 at-bats, the hitter slugs .453, bats .278, gets on base at .342 and has an OPS of .794.

Formula and units

Total bases = 1B + 2 × 2B + 3 × 3B + 4 × HR. At-bats = hits + at-bats without a hit. SLG = total bases ÷ at-bats; AVG = hits ÷ at-bats; ISO = SLG − AVG. OBP = (H + BB + HBP) ÷ (AB + BB + HBP + SF); OPS = OBP + SLG. ISO and OPS use unrounded values, then everything shows to three decimals in the usual .xxx style.

Worked examples

Full season: 153 hits in 550 at-bats: Singles: 100 1B; Doubles: 30 2B; Triples: 3 3B; Home runs: 20 HR; At-bats without a hit (AB − H: outs, errors, fielder’s choices): 397 at-bats; Walks (for OBP): 50 BB; Hit by pitch (for OBP): 5 HBP; Sacrifice flies (for OBP): 4 SF.
Example result: Slugging percentage (SLG): .453; Total bases: 249; Batting average (AVG): .278; Isolated power (ISO): .175; On-base percentage (OBP): .342; OPS (OBP + SLG): .794.

Short season: 40 hits in 100 at-bats: Singles: 25 1B; Doubles: 8 2B; Triples: 1 3B; Home runs: 6 HR; At-bats without a hit (AB − H: outs, errors, fielder’s choices): 60 at-bats; Walks (for OBP): 12 BB; Hit by pitch (for OBP): 1 HBP; Sacrifice flies (for OBP): 2 SF.
Example result: Slugging percentage (SLG): .680; Total bases: 68; Batting average (AVG): .400; Isolated power (ISO): .280; On-base percentage (OBP): .461; OPS (OBP + SLG): 1.141.

Limitations and common mistakes

Uses the standard official-scoring definitions; walks, hit-by-pitch and sacrifice flies affect only OBP and OPS, and sacrifice bunts and catcher’s interference are excluded. Because ISO and OPS come from unrounded values, they can differ by .001 from subtracting or adding the rounded figures.

Counting a home run as one base in total bases, or entering total hits in the singles box, which double counts extra-base hits.

Sources and assumptions

Method SLUGGING-PERCENTAGE-1.0; last formula review 2026-11-04. Sources and their supported claims. Calculation methodology.