OPS Calculator (On-Base Plus Slugging)

Q: How do I calculate my OPS?

To calculate your OPS: Calculate your on-base percentage (OBP): Add your hits, walks, and hits by pitch together. Divide that number by the sum of your at-bats, walks, hits by pitch, and sacrifice flies. Calculate your slugging percentage (SLG): First, find your total bases by weighting your hits: singles + (2 × doubles) + (3 × triples) + (4 × home runs) Then, divide those total bases by your official at-bats (excluding walks, HBP, and sacrifices). Finally, simply add your OBP and SLG results together to find your final OPS baseball score.

Q: What is a good score on this scale?

According to the Bill James scale, an average league score sits between .700 and .766. Anything climbing past .900 represents an elite, All-Star level player on the MLB OPS leaders charts.

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Claudia Herambourg

Claudia Herambourg is an aspiring computational linguist with a passion for both words and numbers. She holds a Bachelor’s degree in English Literature and Mathematical Studies from University College Cork, Ireland. She is currently pursuing her Master’s degree in Linguistics at Sorbonne Nouvelle University in Paris, specializing in computational linguistics. In her spare time, you'll probably find her reading a book of Japanese literature that nobody has ever heard of, on a train going nowhere. See full profile

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Joanna Śmietańska, PhD

Joanna ŚmietańskaPhD, AGH University of Krakow, Cracow, Poland

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Joanna Śmietanska-Nowak is an academic teacher at AGH University of Science and Technology in Kraków. Her research interests focus on protein crystallography and modulated systems, though she has previously worked on photocatalysis and energy storage systems, including supercapacitors and Li-ion batteries. She has participated in and led several research projects funded by the Polish National Science Centre. While working at Omni, she primarily developed calculators related to physics, chemistry, and mathematics. In her free time, she enjoys playing board games, cooking, hiking, and brewing beer. See full profile

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Steven Wooding

Steven Wooding is a physicist by training with a degree from the University of Surrey specializing in nuclear physics. He loves data analysis and computer programming. He has worked on exciting projects such as environmentally aware radar, using genetic algorithms to tune radar, and building the UK vaccine queue calculator. Steve is now the Editorial Quality Assurance Coordinator here at Omni Calculator, making sure every calculator meets the standards our users expect. In his spare time, he enjoys cycling, photography, wildlife watching, and long walks. See full profile

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The OPS calculator is a comprehensive baseball statistics tool that calculates on-base plus slugging (OPS), on-base percentage (OBP), slugging percentage (SLG), and batting average (BA). Before jumping into our calculator, you may want to learn:

What OPS in baseball is;
How to calculate OPS;
How to use our OPS calculator; and
How to read a performance rating chart used by professional MLB OPS leaders.

Whether you are analyzing player performance, studying sabermetrics, or managing a fantasy baseball team, this OPS calculator is everything you need.

What is OPS in baseball?

You may wonder, “What is OPS in baseball?” Well, first of all, OPS stands for on-base plus slugging and is a sabermetric statistic that combines a player’s ability to get on base with their power hitting. Created by statistician Pete Palmer and popularized by Bill James, OPS in baseball is one of the most widely used metrics for evaluating offensive performance.

The baseline formula is simple yet powerful: $\mathrm{OPS = OBP + SLG}$ . Understanding what OPS means in baseball helps fans see why it is considered a far better indicator of offensive value than traditional batting average.

🔎 To learn more about this metric, you may want to check out this article: “Why OPS Works”.

Baseball acronyms explained

Here is everything you need to know to understand the OPS formulas:

$\text{OPS}$ (on-base plus slugging) — A hitter’s true offensive value.
$\text{OBP}$ (on-base percentage) — How frequently a batter successfully reaches base safely.
$\text{SLG}$ (slugging percentage) — A batter’s raw hitting power.
$\text{BA}$ (batting average) — A player’s ratio of safe hits relative to their total official at-bats (excluding walks, HBP, and sacrifices).
$\text{TB}$ (total bases) — The physical distance a player gains safely through their own hits.
$\text{1B}$ (singles) — Hits where the batter safely reaches first base only.
$\text{2B}$ (doubles) — Hits where the batter safely reaches second base.
$\text{3B}$ (triples) — Hits where the batter safely reaches third base.
$\text{HR}$ (home runs) — Hits where the batter safely circles all bases to score a run.
$\text{BB}$ (bases on balls/walks) — The number of times a batter earns a free trip to first base by drawing four balls during a plate appearance.
$\text{HBP}$ (hit by pitch) — The number of times a batter is struck by a pitched ball and awarded first base automatically.
$\text{AB}$ (at bats) — Official times turning up to bat, excluding walks, hit-by-pitch events, and sacrifice bunts and sacrifice flies.
$\text{SF}$ (sacrifice flies) — Batted fly outs that successfully allowed a base runner already on third base to tag up and score.

How to calculate OPS by hand

Check out this section if you want to know how to calculate OPS!

1. First, you need the on-base percentage (OBP). It measures how often a batter reaches base safely, including hits, walks, and hits by pitches:

\text{OBP} = \frac{\rm{H+BB+HBP}}{\rm{AB+BB+HBP+SF}}

For instance, a good OBP is .340 or higher.

💡 If you are unsure about what the letters mean, check out our baseball acronyms explained section just above

2. Then, you need the slugging percentage (SLG). It measures the total bases (TB) earned per at-bat (AB), reflecting a player’s power:

\text{SLG} = \frac{\rm{TB}}{\rm{AB}}

3. Then, the total bases (TB), are calculated by weighting each type of hit:

\begin{align*} \text{TB} =\ &\mathrm{1B+(2\times2B)+(3\times3B)}\\ &+ \mathrm{(4\times HR)} \end{align*}

4. Once you have both percentages, simply add them together to find the final OPS score.

\mathrm{OPS = OBP+SLG}

How to use the OPS calculator

Using our OPS calculator is pretty straightforward!

First, enter your hitting metrics. Because “Hits” (H), “Singles” (1B), “Doubles” (2B), “Triples” (3B), and “Home runs” (HR) are all mathematically interconnected, once you have four fields out of these five, the fourth one will update automatically.
Then, complete the other metrics needed: “Walks” (BB), “Hit by pitch” (HBP), “At bats” (AB), and “Sacrifice flies” (SF).
That’s it! The OPS calculator computes your “On-base plus slugging” (OPS), “On-base percentage” (OBP), “Slugging percentage” (SLG), “Batting average” (BA), and “Total bases” (TB) instantly.

🙋 Check out our ERA (earned run average) calculator if you want to calculate that pitching metric to see how the other side of the game stacks up.

OPS rating scale table (What does OPS mean in baseball?)

Bill James popularized this widely used rating scale to evaluate performance tiers:

OPS Range	Grade	Rating	Description
1.000+	A+	MVP Caliber	Elite superstar
.900 - .999	A	Excellent	All-Star caliber performance
.833 - .899	B+	Very Good	Well above average hitter
.767 - .832	B	Above Average	Solid offensive contributor
.700 - .766	C	Average	League average production
.633 - .699	D	Below Average	Needs improvement
.566 - .632	E	Poor	Struggling at the plate
Below .566	F	Very Poor	Significant offensive challenges

FAQs

How do I calculate my OPS?

To calculate your OPS:

Calculate your on-base percentage (OBP): Add your hits, walks, and hits by pitch together. Divide that number by the sum of your at-bats, walks, hits by pitch, and sacrifice flies.
Calculate your slugging percentage (SLG): First, find your total bases by weighting your hits:

singles + (2 × doubles) + (3 × triples) + (4 × home runs)

Then, divide those total bases by your official at-bats (excluding walks, HBP, and sacrifices).
Finally, simply add your OBP and SLG results together to find your final OPS baseball score.

Who are the all-time historical leaders for OPS?

Here are some of the highest career MLB OPS leaders in baseball history:

Babe Ruth: 1.1636 OPS (highest ever);
Ted Williams: 1.1155 OPS;
Lou Gehrig: 1.0798 OPS;
Barry Bonds: 1.0512 OPS; and
Mule Suttles: 1.0176 OPS.

What is a player’s Total Bases with 100 hits?

Suppose a player has 100 hits consisting of 70 singles, 20 doubles, 7 triples, and 3 home runs; their total bases score is 143. The calculation is straightforward:

Singles (1B): 70 hits × 1 base = 70.
Doubles (2B): 20 hits × 2 bases = 40.
Triples (3B): 7 hits × 3 bases = 21.
Home runs (HR): 3 hits × 4 bases = 12.
This gives you: 70 + 40 + 21 + 12 = 143.

What is a good score on this scale?

According to the Bill James scale, an average league score sits between .700 and .766. Anything climbing past .900 represents an elite, All-Star level player on the MLB OPS leaders charts.