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OPS (on-base plus slugging) calculator

OPS combines the two halves of hitting — getting on base and hitting for power — into one number: OPS = OBP + SLG. On-base percentage = (H + BB + HBP) ÷ (AB + BB + HBP + SF); slugging = (1B + 2·2B + 3·3B + 4·HR) ÷ AB, with singles = H − 2B − 3B − HR. It is the fastest all-round gauge of an offensive player.

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Slugging percentage (SLG) calculatorSlugging percentage measures a hitter's power by total bases per at-bat: SLG = (1B + 2·2B + 3·3B + 4·HR) ÷ AB. Unlike batting average, it weights extra-base hits, so a slugger who hits doubles and homers scores far higher than a singles hitter.On-Base Percentage Calculator (OBP)Compute a baseball slash line — OBP, AVG, SLG, OPS and OPS+ — from a batting line, with the formulas and MLB benchmarks to grade the result.At-bats per home run (AB/HR) calculatorAt-bats per home run shows how often a hitter goes deep: AB/HR = at-bats ÷ home runs. A lower number means more frequent power — elite sluggers sit around one homer every 10–15 at-bats.Batting average calculatorCompute a baseball or softball batting average from hits and at-bats.FIP (Fielding Independent Pitching) calculatorFIP estimates a pitcher's run prevention using only the outcomes they control — home runs, walks, hit-by-pitches and strikeouts — scaled to look like ERA: FIP = ((13·HR) + (3·(BB + HBP)) − (2·K)) ÷ IP + constant. The league constant (default 3.10) sets FIP to the same scale as league ERA. Innings use the .1 = ⅓, .2 = ⅔ notation.Total bases (TB) calculatorTotal bases counts every base a hitter earns from hits, weighting each by its value: TB = 1B + 2·2B + 3·3B + 4·HR. Add at-bats and it also returns the slugging percentage (TB ÷ AB).WAR (Wins Above Replacement) calculator — simplifiedA transparent, educational estimate of Wins Above Replacement. For a position player it builds batting runs from a wOBA-style comparison of the hitter's OBP/SLG to the league, adds baserunning and a positional adjustment, then converts runs above replacement to wins (÷ runs per win, default 10). For a pitcher it works from ERA versus the league. It is a teaching model, not official fWAR or bWAR.WHIP (walks + hits per inning pitched) calculatorWHIP measures how many baserunners a pitcher allows per inning via walks and hits: WHIP = (hits + walks) ÷ innings pitched. Lower is better — an elite WHIP is under 1.00. Innings use the .1 = ⅓, .2 = ⅔ notation.

Enter Hits (H), Doubles (2B), Triples (3B), Home runs (HR), Walks (BB), Hit by pitch (HBP), At-bats (AB), Sacrifice flies (SF) and the OPS (on-base plus slugging) calculator works out On-base percentage (OBP), Slugging percentage (SLG), OPS straight away. For instance, with Hits (H) = 180, Doubles (2B) = 30, Triples (3B) = 5, Home runs (HR) = 25, Walks (BB) = 60, Hit by pitch (HBP) = 5, At-bats (AB) = 550 and Sacrifice flies (SF) = 5 it returns On-base percentage (OBP) = .395, Slugging percentage (SLG) = .536 and OPS = .932.

How to use it

  1. Enter your values: Hits (H), Doubles (2B), Triples (3B), Home runs (HR), Walks (BB), Hit by pitch (HBP), At-bats (AB), Sacrifice flies (SF).
  2. Read the result instantly: On-base percentage (OBP), Slugging percentage (SLG), OPS.

Frequently asked questions

What does the OPS (on-base plus slugging) calculator actually compute?

It takes Hits (H), Doubles (2B), Triples (3B), Home runs (HR), Walks (BB), Hit by pitch (HBP), At-bats (AB) and Sacrifice flies (SF) and derives On-base percentage (OBP), Slugging percentage (SLG) and OPS from them. The calculation is live as you type, so the result updates on every change.

What information do I need to provide?

8 values: Hits (H), Doubles (2B), Triples (3B), Home runs (HR), Walks (BB), Hit by pitch (HBP), At-bats (AB) and Sacrifice flies (SF). Nothing else is required — no account, no file upload.

Can you show a worked example?

With Hits (H) = 180, Doubles (2B) = 30, Triples (3B) = 5, Home runs (HR) = 25, Walks (BB) = 60, Hit by pitch (HBP) = 5, At-bats (AB) = 550 and Sacrifice flies (SF) = 5, the calculator returns On-base percentage (OBP) = .395, Slugging percentage (SLG) = .536 and OPS = .932. Those figures come from running this exact tool, so you can reproduce them by entering the same values.

When would I actually use this?

Running a league or a tournament: how many fixtures a format produces, how the table resolves ties, and what a team still needs to qualify.

What is the most common mistake?

Comparing two figures produced under different rules. A percentage over ten attempts and one over two hundred are not the same claim; the order of tie-breaks, the way a rating is adjusted and what even counts as an attempt are each set by the competition, not by the sport. The number means something next to the rulebook it came from and very little without it.

What is the difference between the OPS (on-base plus slugging) calculator and the Slugging percentage (SLG) calculator?

This one returns On-base percentage (OBP) and OPS; the Slugging percentage (SLG) calculator returns Total bases (TB). That is the whole difference — open the one whose figure you need.

Is there a tool for the next step?

On-Base Percentage Calculator (OBP) is the closest one after this: Compute a baseball slash line — OBP, AVG, SLG, OPS and OPS+ — from a batting line, with the formulas and MLB benchmarks to grade the result.

What else is worth having open alongside it?

At-bats per home run (AB/HR) calculator and Batting average calculator — they come up in the same task often enough to be worth a second tab.

Where do the figures come from, and how current are they?

Fixture counts and point totals are pure combinatorics and hold for any competition. The tie-break order is set by each governing body's own regulations — check the one you are actually in.

Further reading

All guides →
ExplainerOPS Is a Flawed Sum, and Still the Most Useful Number on the CardOPS adds two fractions with different denominators, which as arithmetic is indefensible. It survives because it tracks run scoring far better than batting average and costs nothing to compute — but it underpays on-base ability, and OPS+ does not fix that.ComparisonERA, FIP and WHIP: Three Answers to One QuestionERA measures what happened, FIP measures only what the pitcher controls without his fielders, WHIP measures traffic allowed. Two pitchers can swap places entirely between them — and the gap between ERA and FIP is a forecast, not a verdict.How-toHow to Calculate Batting Average and What .300 MeansBatting average is hits divided by at-bats. Learn how to calculate it, why a .300 hitter is excellent and what counts as an at-bat in baseball.ExplainerHow a Golf Handicap Is Actually Calculated Under the World Handicap SystemBest 8 of your last 20 score differentials, averaged, and no 0.96 multiplier — that disappeared in 2020. Here is the full chain from a gross 92 to a Course Handicap of 17, with the numbers worked out.ExplainerSleeping Bag Temperature Ratings, and What Comfort Actually MeansThe numbers on a sleeping bag come from ISO 23537-1, which publishes four figures and lets retailers print one. The standard measures a heated manikin's heat loss — so it measures insulation, and its own test mat is R 4.8. Put the same bag on an R 1.5 pad and the heat leaving through your back more than triples.ExplainerExpected Goals: What xG Actually MeasuresxG is the fitted probability that a shot with a given set of features becomes a goal — a model output, not an observation. A worked match, the binomial arithmetic that says one game is far too few shots, and the limits nobody quotes.