Slugging Percentage Calculator
Calculate a baseball player's slugging percentage (SLG) — a measure of batting power that weights extra-base hits. Also calculates OPS when combined with on-base percentage.
How to Use
- Enter hit types: singles (1B), doubles (2B), triples (3B), and home runs (HR). Total bases are calculated automatically.
- Enter at-bats (AB): the total number of official at-bats (does not include walks, HBP, sacrifice flies).
- Optional: Enter the player's OBP (as a decimal, e.g. 0.360) to also calculate OPS.
- Results update as you type, including total bases, SLG, and a benchmark rating.
What You'll Discover
- Slugging percentage (SLG) — total bases per at-bat, shown to three decimal places (for example .550).
- SLG as a percentage — the same figure multiplied by 100 (55%). Because SLG can go above 1.000, this can be more than 100%.
- Total bases (TB) — singles + 2 × doubles + 3 × triples + 4 × home runs. It appears as soon as you enter hits, even before at-bats.
- Total hits (H) — the four hit types added together. Divide by at-bats to get batting average.
- OPS — on-base plus slugging, if you enter an OBP.
- Benchmark — a rough rating from Below Average to Elite, based on the table further down this page.
Formula
Total Bases (TB):
TB = (1B × 1) + (2B × 2) + (3B × 3) + (HR × 4)
Slugging Percentage (SLG):
SLG = Total Bases ÷ At-Bats
OPS:
OPS = OBP + SLG
Each type of hit is weighted by the number of bases it earns: a single earns 1, a double 2, a triple 3, and a home run 4. Unlike batting average, SLG can exceed 1.000 in a small sample, such as a single game, though full-season figures stay well below that.
Only have total hits? Work out singles first
Most stat lines list hits (H), doubles, triples and home runs, but not singles. Find singles by subtraction:
1B = H − 2B − 3B − HR
For 160 hits with 30 doubles, 3 triples and 25 home runs, singles = 160 − 30 − 3 − 25 = 102. Total bases = 102 + 60 + 9 + 100 = 271. Over 550 at-bats, SLG = 271 ÷ 550 = .493.
Total Bases: How Each Hit Is Weighted
Slugging percentage is built on total bases. This table shows what each hit type contributes and what is left out.
| Result | Total bases | Counts as an at-bat? |
|---|---|---|
| Single (1B) | 1 | Yes |
| Double (2B) | 2 | Yes |
| Triple (3B) | 3 | Yes |
| Home run (HR) | 4 | Yes |
| Out, strikeout, reached on error or fielder's choice | 0 | Yes |
| Walk or hit by pitch | 0 | No |
| Sacrifice fly or sacrifice bunt | 0 | No |
| Catcher's interference | 0 | No |
Bases gained on stolen bases, wild pitches or errors after the hit do not add to total bases. A single that turns into "a double" because the outfielder bobbled the ball is still a single plus an error.
The 1-2-3-4 weighting is a convention, not a precise measure of value. A home run is worth more than four singles in some situations and less in others. Even so, SLG is one of the simplest ways to see how much damage a hitter does when they make contact.
SLG Benchmarks
| SLG | Rating | Context |
|---|---|---|
| Below .350 | Below Average | Weak power output |
| .350 – .449 | Average | Typical MLB hitter |
| .450 – .499 | Good | Above-average power |
| .500 – .599 | Excellent | All-Star power hitter |
| .600+ | Elite | Historic power season |
These bands are a rough guide for adult professional baseball. League-wide power levels change from season to season, and youth, college and softball numbers run on different scales.
Historical context: Babe Ruth's career slugging percentage of .690 sits at the top of Baseball-Reference's career leaderboard. Since Negro Leagues statistics became part of the major league record, Josh Gibson's 1937 season leads Baseball-Reference's single-season slugging list. A .500 SLG over a full season reliably places a player among the league's better power hitters.
Examples
| 1B | 2B | 3B | HR | AB | TB | SLG |
|---|---|---|---|---|---|---|
| 100 | 30 | 5 | 25 | 500 | 275 | .550 |
| 90 | 25 | 3 | 15 | 480 | 209 | .435 |
| 80 | 20 | 2 | 40 | 450 | 286 | .636 |
| 110 | 28 | 6 | 10 | 520 | 224 | .431 |
Worked through for the first row: total bases = 100 + (30 × 2) + (5 × 3) + (25 × 4) = 100 + 60 + 15 + 100 = 275. 275 ÷ 500 = .550.
Slugging vs Batting Average vs ISO vs OPS
SLG is most useful next to the stats it is usually paired with. Here is the first example hitter above (160 hits, 275 total bases, 500 AB) with an assumed .380 OBP.
| Stat | Formula | What it measures | Example |
|---|---|---|---|
| Batting average (AVG) | H ÷ AB | How often a batter gets a hit | .320 |
| Slugging percentage (SLG) | TB ÷ AB | Total bases per at-bat | .550 |
| Isolated power (ISO) | SLG − AVG | Extra bases per at-bat, beyond first base | .230 |
| OPS | OBP + SLG | A quick all-round measure of offense | .930 |
ISO strips singles out of slugging, so it isolates raw power. You can get it from this calculator: divide Total Hits by AB to get AVG, then subtract that from SLG.
Two hitters with the same batting average can be very different. Hitter A has 150 singles in 500 at-bats: a .300 AVG and a .300 SLG, with an ISO of .000. Hitter B also has 150 hits in 500 at-bats, but 20 are doubles, 5 are triples and 25 are home runs. Hitter B's total bases are 255, for a .510 SLG and an ISO of .210. Batting average alone would rate them the same.
What Is My Slugging Percentage If...
What is my slugging percentage if I went 1-for-4 with a home run?
Going 1-for-4 with a home run gives a slugging percentage of 1.000. The home run is 4 total bases, and 4 ÷ 4 = 1.000. Your batting average for the game is .250.
What is my slugging percentage if I went 2-for-4 with a single and a double?
A single and a double in 4 at-bats is a .750 slugging percentage. Total bases = 1 + 2 = 3, and 3 ÷ 4 = .750.
What is my slugging percentage if I went 3-for-5 with a single, double and home run?
That game is a 1.400 slugging percentage. Total bases = 1 + 2 + 4 = 7, and 7 ÷ 5 = 1.400. Single games often produce SLG above 1.000; full seasons do not.
What is my slugging percentage if I hit a home run in my only at-bat?
A home run in your only at-bat gives the maximum possible slugging percentage: 4.000. 4 total bases ÷ 1 at-bat = 4.000. No hitter can do better, because a home run is the most bases one at-bat can earn.
What is my slugging percentage if all my hits are singles?
If every hit is a single, slugging percentage equals batting average. 150 singles in 500 at-bats is 150 ÷ 500 = .300 for both. Every extra-base hit pushes SLG above AVG.
What is my slugging percentage if I hit .250 with 15 home runs?
With 80 singles, 25 doubles, 5 triples and 15 home runs in 500 at-bats, SLG is .410. Total bases = 80 + 50 + 15 + 60 = 205, and 205 ÷ 500 = .410. That is a .250 batting average with an isolated power of .160.
What is my slugging percentage for 110 singles, 35 doubles, 4 triples and 30 home runs in 560 at-bats?
That season line gives a slugging percentage of .557. Total bases = 110 + 70 + 12 + 120 = 312, and 312 ÷ 560 = 0.5571. It falls in the Excellent band of the benchmark table.
What is my slugging percentage for a youth season of 15 singles, 5 doubles, 1 triple and 2 home runs in 60 at-bats?
That youth season works out to a .600 slugging percentage. Total bases = 15 + 10 + 3 + 8 = 36, and 36 ÷ 60 = .600. The formula is the same at every level; the benchmarks are not.
What is my slugging percentage if I walked?
A walk does not change your slugging percentage. Walks are not at-bats and earn no total bases, so they are left out completely. 2-for-4 with a single, a double and 2 walks is still .750.
What is my slugging percentage if I have no hits?
With no hits, your slugging percentage is .000. Zero total bases divided by any number of at-bats is zero. If you have no at-bats at all, SLG is undefined and the calculator shows only total bases.
People Also Search For
How to calculate slugging percentage by hand
Multiply doubles by 2, triples by 3 and home runs by 4, add the singles, then divide by at-bats. For 100 singles, 30 doubles, 5 triples and 25 home runs in 500 at-bats: 100 + 60 + 15 + 100 = 275, and 275 ÷ 500 = .550.
Slugging percentage formula in Excel or Google Sheets
With 1B, 2B, 3B, HR and AB in columns B to F, use =(B2+2*C2+3*D2+4*E2)/F2. Format the cell to three decimal places. If you only have total hits in B2, singles are =B2-C2-D2-E2 in a helper column.
What is isolated power (ISO)
Isolated power is slugging percentage minus batting average. It counts only the extra bases beyond first. A .550 SLG and a .320 AVG give an ISO of .230. A singles hitter has an ISO near zero.
How to calculate OPS
Add on-base percentage and slugging percentage. A .360 OBP plus a .500 SLG is an .860 OPS. Enter the OBP in the optional field above to get OPS automatically, or use our on-base percentage calculator to find OBP first.
What is the highest possible slugging percentage
The highest possible slugging percentage is 4.000, a home run in every at-bat. It can only happen in a tiny sample. Over a full season, anything above .600 is considered elite.
Slugging percentage vs batting average
Batting average counts every hit as 1; slugging percentage counts each hit by its bases. That makes SLG the better measure of power. SLG can never be lower than batting average, because every hit is worth at least one base.
Frequently Asked Questions
Why is slugging percentage called a "percentage" if it can exceed 1.000?
The name is a historical convention rather than a mathematical one. Slugging percentage is actually a ratio of total bases to at-bats, not a true percentage (which would be capped at 1.0 or 100%). A batter who hit a home run in every at-bat would have a theoretical maximum SLG of 4.000. Like batting average, it is written as a three-place decimal, and the "percentage" name has simply stuck.
What is the difference between slugging percentage and batting average?
Batting average (AVG) treats all hits equally: H / AB. A single counts the same as a home run. Slugging percentage weights hits by their base value: singles count 1, doubles 2, triples 3, home runs 4. This makes SLG a far better measure of power. Two players with identical batting averages can have vastly different slugging percentages based on the types of hits they generate.
What does OPS measure and why is it used?
OPS (On-base Plus Slugging) combines a player's ability to get on base (OBP) with their batting power (SLG). Despite the theoretical impurity of adding two different ratios, OPS is widely used as a quick summary of a hitter's offense. A common rule of thumb treats .800 as good, .900 as excellent and 1.000 as elite for MLB hitters. OPS+ is an adjusted version that accounts for ballparks and is normalized so that 100 is league average.
Do walks count toward slugging percentage?
No. Walks are excluded from both the numerator and denominator of slugging percentage. A walk does not count as an official at-bat and earns no bases in the SLG formula. This is one reason OPS is useful — OBP captures walks while SLG captures power, and together they give a more complete picture than either metric alone.
How do ballpark factors affect slugging percentage?
Ballpark dimensions, elevation, and weather all affect how far the ball carries and how many extra-base hits fall in. Coors Field in Denver, at high altitude, is well known for boosting offense. Park-adjusted statistics such as OPS+ correct for these effects, allowing fairer comparisons of hitters across different stadiums and eras.
What is the highest possible slugging percentage?
4.000, which means a home run in every at-bat. It is only possible over a very small number of at-bats. The lowest possible SLG is .000, meaning no hits at all.
Do sacrifice flies and sacrifice bunts affect slugging percentage?
No. Neither is an official at-bat, and neither earns total bases, so both are left out of SLG. Enter only official at-bats in the AB field.
Can slugging percentage be lower than batting average?
No. Every hit is worth at least one total base, so total bases are always equal to or greater than hits. That makes SLG equal to batting average when every hit is a single, and higher as soon as there is an extra-base hit.
Should I enter total hits or singles in the first field?
Enter singles only. The calculator adds doubles, triples and home runs separately. If your stat line shows total hits, subtract doubles, triples and home runs to get singles: 1B = H − 2B − 3B − HR.
Is slugging percentage used for pitchers?
Yes. The same formula applied to the hits a pitcher allows is called slugging percentage against. It shows how hard opposing batters hit that pitcher; lower is better.
Is my data stored or sent anywhere?
No. All calculations run in your browser. Nothing you type is sent to a server or saved, and no account is needed.
Last reviewed: November 2026 — formulas and worked examples verified.