Slugging Percentage Calculator — Baseball SLG & OPS
Slugging percentage measures a batter's power by weighting each hit type by its base value (single=1, double=2, triple=3, HR=4). Enter your stat line to get SLG, batting average, OBP and OPS.
hits
hits
hits
hits
AB
BB
HBP
SF
League average (.350–.399)
- 1
Total bases
60 + 2 × 20 + 3 × 3 + 4 × 12 = 157Singles count 1 base, doubles 2, triples 3, home runs 4. - 2
Slugging percentage
157 ÷ 400 = 0.393
How does this calculator work?
SLG = (1B + 2×2B + 3×3B + 4×HR) ÷ AB. Example: 60 singles, 20 doubles, 3 triples, 12 HRs in 400 AB → total bases = 60 + 40 + 9 + 48 = 157 → SLG = 157/400 = .393. Add OBP to get OPS; .800 OPS is solid, .900+ is elite for an MLB player.
Formula
How this is calculated
Batting average treats every hit equally, but a home run is clearly more valuable than a single. Slugging percentage corrects for this by crediting the batter with the total number of bases reached per at-bat. A single is worth 1 base, a double 2, a triple 3, and a home run 4. Dividing total bases by official at-bats gives slugging percentage, a decimal between 0 and 4 (though values above 1.000 for a season are impossible in practice).
Slugging percentage is often combined with on-base percentage (OBP) to produce OPS (On-base Plus Slugging), one of the most predictive single-number offensive statistics in baseball. OBP counts walks, hit-by-pitches and sacrifice flies in its denominator to measure how often a batter reaches base by any means. OPS of .800 or above is generally considered excellent; .900+ is elite.
Performance benchmarks reflect MLB averages from the 2020s, where the league-average SLG is roughly .400. Amateur league averages vary considerably and tend to be higher. This calculator does not apply park factors or league adjustments.
Frequently asked questions
The MLB league average SLG is around .400–.410 in a typical season. A SLG of .450+ is above average, .500+ is elite power-hitter territory, and .600+ is exceptional (Ted Williams, Babe Ruth, Barry Bonds territory). Below .350 is below average for a regular player.
If a batter hit a home run on every single at-bat (4 bases per AB), SLG would equal 4.000. In practice the seasonal record is around .863 (Babe Ruth, 1920); single-game maximums can approach 4 with enough home runs in few at-bats.
OPS = OBP + SLG. It is a simple sum of two complementary statistics: OBP rewards getting on base by any means; SLG rewards hitting for power. The sum correlates very strongly with run production at the team level and is easy to calculate without more complex metrics like wRC+ or wOBA.
Also known as
TG we-Calculate Editorial Team. (2026). Slugging Percentage Calculator — Baseball SLG & OPS [Online calculator]. TG we-Calculate. https://we-calculate.com/calculator/slugging-percentage-calculator
TG we-Calculate Editorial Team. "Slugging Percentage Calculator — Baseball SLG & OPS." TG we-Calculate. 2026. https://we-calculate.com/calculator/slugging-percentage-calculator.
TG we-Calculate Editorial Team, "Slugging Percentage Calculator — Baseball SLG & OPS," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/calculator/slugging-percentage-calculator
@misc{wecalculate_slugging_percentage_calculator, title = {Slugging Percentage Calculator — Baseball SLG & OPS}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/calculator/slugging-percentage-calculator}}, year = {2026}, note = {TG we-Calculate} }
Did this calculator help you?