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Slugging Percentage Calculator (SLG) - Calculate MLB Power Stats
style="max-width: 900px; margin: 0 auto; font-size: 16px; color: #000000; line-height: 1.7;" Calculate slugging percentage (SLG) instantly by entering your singles, doubles, triples, home runs, and at-bats. Our free baseball slugging calculator provides immediate power classifications, OPS calculations, and MLB player comparisons to help you understand your offensive performance. Whether you're tracking youth baseball stats, analyzing college performance, or comparing to MLB standards, get accurate slugging percentage calculations with detailed explanations of what makes great power hitting.Calculate Slugging Percentage
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Understanding Slugging Percentage (SLG)
What is Slugging Percentage?
Slugging percentage (SLG) is a baseball statistic that measures a batter's power by calculating the total number of bases a player records per at-bat. Unlike batting average which treats all hits equally, slugging percentage weighs extra-base hits more heavily, making it a better indicator of offensive power and run production potential.
The Formula: SLG = Total Bases ÷ At-Bats
Total Bases Calculation: (Singles × 1) + (Doubles × 2) + (Triples × 3) + (Home Runs × 4)
Example: If a player has 150 at-bats with 20 singles, 10 doubles, 2 triples, and 8 home runs, their total bases would be (20×1) + (10×2) + (2×3) + (8×4) = 20 + 20 + 6 + 32 = 78 total bases. Their slugging percentage would be 78 ÷ 150 = .520, which is excellent power production.
Slugging Percentage Benchmarks & Power Classifications
Understanding what constitutes good, great, or elite slugging percentage helps you evaluate offensive performance across different competition levels. Here are the standard MLB benchmarks:
| SLG Range | Classification | What It Means |
|---|---|---|
| .600+ | Elite Power | MVP-caliber slugging; historically great season |
| .550 - .599 | Excellent Power | All-Star level power hitter; top 10% of MLB |
| .500 - .549 | Very Good Power | Above-average power; solid middle-of-order bat |
| .450 - .499 | Good Power | Average to above-average MLB slugging |
| .400 - .449 | Solid Average | MLB average slugging; respectable power |
| .350 - .399 | Below Average | Limited power; contact-oriented hitter |
| Below .350 | Weak Power | Very limited power production |
2024 MLB Leaders: 
New York Yankees superstar Aaron Judge led MLB with a .701 slugging percentage, followed by 
Los Angeles Dodgers two-way phenom Shohei Ohtani at .646. Both performances represent elite, historically rare power production.
Slugging Percentage vs. Other Batting Statistics
Slugging percentage is just one piece of the offensive puzzle. Here's how it compares and combines with other key batting statistics:
SLG vs. Batting Average (AVG)
Batting average simply measures hits per at-bat (.300 = 30% hit rate), treating all hits equally. Slugging percentage weighs extra-base hits, making it a better measure of power. A player can have a high average with no power (.320 AVG, .380 SLG) or moderate average with elite power (.260 AVG, .550 SLG).
Example: 
Atlanta Braves contact hitter Michael Harris II hit .269 with a .406 SLG in 2024—solid average, moderate power. Meanwhile, 
Arizona Diamondbacks slugger Christian Walker hit .251 but slugged .468 with 26 home runs—lower average but more power.
OPS: The Complete Picture
On-Base Plus Slugging (OPS) combines on-base percentage (OBP) with slugging percentage to create baseball's most comprehensive offensive metric. OPS = OBP + SLG. It measures both your ability to reach base (walks, hits, HBP) and your power (extra-base hits). An .800 OPS is good, .900 is excellent, and 1.000+ is elite.
Example: 
Philadelphia Phillies star Bryce Harper posted a .373 OBP and .525 SLG in 2024 for a .898 OPS—demonstrating elite performance in both getting on base and hitting for power, making him one of baseball's most valuable offensive players.
Isolated Power (ISO): Pure Power Measurement
Isolated Power (ISO) is calculated as SLG minus AVG, isolating extra bases from all bases. It's the purest measure of raw power, showing how many extra bases a player averages per at-bat. ISO removes singles to focus solely on doubles, triples, and home runs.
ISO Benchmarks:
- .250+ = Elite power (top sluggers)
- .200-.249 = Excellent power (All-Star level)
- .170-.199 = Above-average power
- .140-.169 = Average MLB power
- Below .140 = Below-average power
Example: Atlanta Braves slugger Marcell Ozuna hit .302 with a .546 SLG in 2024, giving him a .244 ISO—elite raw power that produced 39 home runs and made him one of the National League's most feared hitters.
Historic Slugging Percentage Achievements
Baseball history is filled with legendary slugging performances that define eras and set benchmarks for power hitting:
- All-Time Single Season Record: Barry Bonds (.863 SLG in 2001) - The highest slugging percentage ever recorded in a season, with 73 home runs
- Career Leader: Babe Ruth (.690 career SLG) - The Sultan of Swat's career mark remains untouchable nearly a century later
- Modern Excellence:
Los Angeles Angels' Mike Trout (.582 career SLG through 2024) represents sustained modern power excellence - 2024 Historic Season: Shohei Ohtani's 50 HR/50 SB season (.646 SLG) - A never-before-seen combination of power and speed
These achievements demonstrate how slugging percentage captures baseball's most exciting offensive moments—the extra-base hits and home runs that win games and thrill fans.
Who Should Use the Slugging Percentage Calculator?
Our slugging percentage calculator is designed for everyone involved in baseball, from youth players to professional scouts:
Youth & High School Players
Track your power development throughout the season. See how adding strength training impacts your extra-base hit production. Compare your slugging percentage to league averages to identify if you're more of a contact hitter or power hitter, helping you understand your offensive identity and potential.
College Players & Prospects
College scouts heavily weigh slugging percentage when evaluating prospects. A .550+ SLG at the college level indicates legitimate professional power potential. Track your ISO to measure pure power growth separate from batting average.
Coaches & Team Staff
Optimize batting order by placing high-SLG hitters in run-producing spots (3-4-5 in the lineup). Identify which players provide power vs. contact, helping you build balanced lineups. Track team slugging percentage trends to evaluate offensive coaching effectiveness.
Fantasy Baseball Managers
SLG is a core fantasy baseball category. Identify undervalued power hitters with high SLG but lower batting averages. Project player values by combining SLG trends with plate appearance projections. Target players whose ISO is rising, indicating developing power.
How to Improve Your Slugging Percentage
Increasing slugging percentage requires developing power, improving contact quality, and making strategic adjustments. Here are proven methods to boost your SLG:
- Strength Training: Focus on core rotation, leg drive, and forearm/wrist strength. Power comes from the ground up through proper weight transfer.
- Launch Angle Optimization: Aim for 15-30 degree launch angles on contact for optimal distance. Too flat = ground balls; too steep = pop-ups.
- Exit Velocity Development: Increase bat speed through proper mechanics and strength. Elite sluggers generate 95+ mph exit velocity consistently.
- Pitch Selection: Hunt fastballs in hitter's counts (2-0, 3-1). Lay off pitcher's pitches. Extra-base hits come from driving your pitch, not theirs.
- Gap Approach: Don't just pull for home runs. Driving balls into gaps (left-center, right-center) produces doubles and triples that boost SLG.
- Analyze Your Metrics: Track which pitches you hit for extra bases. If you slug .600 on fastballs but .300 on breaking balls, you know where to focus training.
Remember: Increasing slugging percentage doesn't mean swinging for the fences every time. 
Houston Astros star Jose Altuve is only 5'6" but maintains a .450+ career SLG through exceptional bat-to-ball skills, strong contact quality, and smart pitch selection—proof that power comes in all sizes.
Slugging Percentage FAQs
What is a good slugging percentage in baseball?
In MLB, a slugging percentage above .450 is considered good, .500+ is very good, and .550+ is excellent All-Star level power. The league average typically hovers around .400-.420. For youth baseball, standards vary by age and competition level, but .500+ generally indicates strong power for high school players. Elite college sluggers often post .550-.600+ SLG.
Can slugging percentage be higher than 1.000?
Yes! Unlike batting average which caps at 1.000 (getting a hit every at-bat), slugging percentage can theoretically reach 4.000 if a player hit a home run in every at-bat (4 bases per AB). In reality, the highest single-season slugging percentage ever was Barry Bonds' .863 in 2001. Babe Ruth holds the career record at .690. Any SLG over 1.000 would require an impossibly dominant power display.
How is slugging percentage different from batting average?
Batting average treats all hits equally (single = home run = 1 hit), measuring only hit frequency. Slugging percentage weighs hits by total bases (single=1, double=2, triple=3, HR=4), measuring power and extra-base hit ability. A singles hitter might bat .320 with a .380 SLG, while a power hitter bats .250 with a .520 SLG. Slugging percentage better predicts run production because extra-base hits drive in more runs.
What is OPS and why does it matter?
OPS (On-Base Plus Slugging) adds your on-base percentage to your slugging percentage, creating baseball's most comprehensive offensive statistic. It measures both your ability to reach base (via hits, walks, HBP) and your power (extra-base hits). An .800 OPS is good, .900 is excellent, and 1.000+ is elite MVP-caliber production. OPS correlates strongly with run scoring and team offensive success, making it invaluable for player evaluation.
Do walks count in slugging percentage?
No. Walks, hit-by-pitches, and sacrifice flies do not count as at-bats, so they don't affect slugging percentage. This is why SLG is purely a power metric—it only measures what happens when you put the ball in play as an official at-bat. Walks do count toward on-base percentage (OBP), which is why OPS (OBP + SLG) provides a more complete offensive picture by combining reach-base ability with power.
Who has the highest slugging percentage in MLB history?
Babe Ruth holds the all-time career slugging percentage record at .690 over 22 seasons (1914-1935). For a single season, Barry Bonds posted an incredible .863 slugging percentage in 2001 with 73 home runs—the highest ever. Among active players, Mike Trout (.582 career SLG) and Aaron Judge (.578 career SLG) lead the way in sustained power excellence.
How often should I calculate my slugging percentage?
Calculate your slugging percentage weekly or monthly during the season to track trends. Small sample sizes (10-20 ABs) can be misleading, so wait until you have at least 50-100 at-bats for meaningful analysis. Compare your SLG across different months to identify hot and cold stretches. Track it alongside batting average and OBP for complete offensive self-evaluation. Many youth and high school players see their SLG increase throughout the season as they adjust to pitching.