Baseball Slugging Percentage Calculator
Calculate slugging percentage (SLG) and comprehensive power statistics. Enter singles, doubles, triples, home runs, and at-bats to get SLG, total bases, isolated power (ISO), batting average, and power ratings compared to MLB averages.
What is slugging percentage in baseball?
Slugging Percentage (SLG) measures a player's power by calculating total bases per at-bat. Formula: SLG = Total Bases ÷ At-Bats, where Total Bases = (1B × 1) + (2B × 2) + (3B × 3) + (HR × 4). Unlike batting average which treats all hits equally, slugging percentage rewards extra-base hits. A .500 SLG means a player averages half a base per at-bat.
How do you calculate slugging percentage?
Step 1: Calculate Total Bases = (Singles × 1) + (Doubles × 2) + (Triples × 3) + (Home Runs × 4). Step 2: Divide by At-Bats. Example: In 500 AB, a player has 90 singles, 30 doubles, 5 triples, 25 home runs. Total Bases = (90×1) + (30×2) + (5×3) + (25×4) = 90 + 60 + 15 + 100 = 265. SLG = 265 ÷ 500 = .530
What is a good slugging percentage?
MLB averages around .400-.410. Ratings: .550+ (Elite power - MVP candidates), .500-.549 (Excellent power - All-Stars), .450-.499 (Above average power), .400-.449 (Average power), .350-.399 (Below average power), under .350 (Limited power). Power hitters like Aaron Judge and Shohei Ohtani often exceed .600. The all-time single-season record is .863 by Barry Bonds (2001).
What is the difference between slugging percentage and batting average?
Batting Average = Hits ÷ At-Bats (treats all hits equally). Slugging Percentage = Total Bases ÷ At-Bats (weights hits by bases: 1B=1, 2B=2, 3B=3, HR=4). Example: Player A has 10 singles in 20 AB (.500 AVG, .500 SLG). Player B has 5 home runs in 20 AB (.250 AVG, 1.000 SLG). Player B has less contact but much more power per hit.
What is Isolated Power (ISO)?
ISO (Isolated Power) = SLG - AVG. It measures raw power by removing the batting average component. ISO shows extra bases per at-bat beyond singles. MLB average ISO is about .160-.170. Ratings: .250+ (Elite), .200-.249 (Great), .150-.199 (Above Average), .120-.149 (Average), .100-.119 (Below Average), under .100 (No power). ISO helps identify power hitters versus high-average slap hitters.
Can slugging percentage be higher than 1.000?
Yes! While batting average caps at 1.000 (100% hits), slugging percentage can exceed 1.000 with enough extra-base hits. If a player hits 4 home runs in 4 at-bats, SLG = 16 total bases ÷ 4 AB = 4.000. Theoretically, max SLG is 4.000 (all home runs). In reality, season SLGs above .700 are exceptional. Babe Ruth's .847 (1920) and Barry Bonds' .863 (2001) are historic records.
How do walks affect slugging percentage?
Walks do NOT affect slugging percentage. Walks don't count as at-bats or bases in the SLG calculation. SLG only measures power from hits. This is different from On-Base Percentage (OBP), which includes walks. A patient power hitter with many walks will have high OBP and high SLG. Combined (OPS = OBP + SLG), this shows elite offensive production.