wOBA Calculator (Weighted On-Base Average)

Enter your plate appearance stats — unintentional walks, hit by pitch, singles, doubles, triples, home runs, at bats, intentional walks, and sacrifice flies — and the wOBA Calculator returns your Weighted On-Base Average along with a breakdown of how each offensive event contributes to the score. Unlike batting average or OBP, wOBA weights each way of reaching base by its actual run value. Also try the OPS Calculator (On-Base Plus Slugging).

Walks that were not intentional (excludes IBB)

Intentional walks are excluded from wOBA numerator but added to PA denominator

Includes hits, errors, fielder's choice, and outs

Results

wOBA

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Rating

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Plate Appearances

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Weighted Run Value

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OBP (for reference)

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Frequently Asked Questions

What is wOBA in baseball?

Weighted On-Base Average (wOBA) is an advanced offensive statistic that measures a hitter's overall value by weighting each way of reaching base according to its actual run-scoring impact. Created by sabermetrician Tom Tango, it improves on batting average, OBP, and slugging by assigning different values to walks, singles, doubles, triples, and home runs based on how many runs each event is worth on average. See also our use the Magic Number Calculator (Standings).

What is a good wOBA?

wOBA is scaled to look similar to OBP. A wOBA around .320 is considered league average. Ratings roughly break down as: below .290 is poor, .290–.319 is below average, .320–.339 is average, .340–.369 is above average, .370–.399 is great, and .400+ is elite. Miguel Cabrera's MVP seasons and Barry Bonds' peak years consistently posted wOBA above .450.

Why is wOBA better than batting average?

Batting average treats every hit equally and ignores walks and hit-by-pitches entirely. wOBA fixes both problems by (1) distinguishing between singles, doubles, triples, and home runs using their actual run values, and (2) crediting hitters for walks and HBP. This makes it a far more accurate reflection of a batter's true offensive contribution.

Is wOBA scaled like OBP?

Yes — wOBA is intentionally scaled so that league-average wOBA in a given season closely mirrors league-average OBP, typically landing around .320. This makes it easy to interpret for fans already familiar with OBP, while still carrying the additional accuracy of run-value weighting.

Do intentional walks count in wOBA?

Intentional walks (IBB) are excluded from the numerator of the wOBA formula because they are largely not a reflection of the batter's skill. However, they are added to the denominator (plate appearances) so they do slightly lower a hitter's wOBA. This calculator handles IBB exactly that way.

Does wOBA change year to year?

Yes — the linear weights used in wOBA (the multipliers for each event) are recalculated each season based on that year's run environment. A home run in a high-scoring era is worth slightly more than in a pitching-dominated era. Sites like FanGraphs publish updated wOBA constants annually. This calculator uses standard modern weights (approximately 2015–2023 average values).

Does wOBA include baserunning or defense?

No. wOBA is a pure batting metric and only accounts for events at the plate. It does not include stolen bases, caught stealing, baserunning advancement, or any defensive contributions. For a complete player valuation, wOBA is typically used as an input to metrics like wRC+ or WAR.

What are the linear weights used in wOBA?

Standard modern wOBA weights are approximately: unintentional walk × 0.69, hit by pitch × 0.72, single × 0.89, double × 1.27, triple × 1.62, and home run × 2.10. These values represent the average number of runs each event produces above the baseline of an out, scaled to match OBP levels.