Hitter Projection Calculator: wRC+ and Weighted On-Base Average (wOBA)
Project a hitter's Weighted On-Base Average (wOBA) and park/league-adjusted Weighted Runs Created Plus (wRC+) using FanGraphs-style linear weights. Enter your hitter's counting stats and league context below.
Plate Appearance Breakdown
League Context
Fill in the fields above and click Calculate.
Formulas Used
wOBA (Weighted On-Base Average):
wOBA = (0.690×uBB + 0.722×HBP + 0.888×1B + 1.271×2B + 1.616×3B + 2.101×HR)
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AB + uBB + SF + HBP
where uBB = BB − IBB (unintentional walks)
wRAA (Weighted Runs Above Average):
wRAA = ((wOBA − lgwOBA) / wOBAScale) × PA
wRC (Weighted Runs Created):
wRC = wRAA + (lgR/PA × PA)
wRC+ (Park & League Adjusted):
wRC+ = 100 × [ ((wOBA − lgwOBA) / wOBAScale) + lgR/PA ]
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lgR/PA × ParkFactor
wRC+ = 100 means exactly league average. Every point above/below 100 is one percentage point better/worse than league average, park-adjusted.
Assumptions & References
- Linear weights (0.690, 0.722, 0.888, 1.271, 1.616, 2.101) are FanGraphs 2022–2023 season constants from the FanGraphs Guts! page. Update these annually for maximum accuracy.
- Default league wOBA (0.320), OBP (0.318), wOBA Scale (1.157), and R/PA (0.1150) reflect approximate 2023 MLB averages. Adjust for the specific season and league (AL/NL) being projected.
- Park Factor of 100 = perfectly neutral park. Values above 100 favor hitters (e.g., Coors Field ≈ 115); below 100 favor pitchers.
- Intentional walks (IBB) are excluded from the wOBA numerator and denominator per FanGraphs methodology, as they do not reflect hitter skill.
- wRC+ is park- and league-adjusted, making it the best single-number comparison across eras and ballparks.
- wOBA benchmarks: ≥.400 Elite, .370 Great, .340 Above Avg, .310 Average, .280 Below Avg, .250 Poor.
- wRC+ benchmarks: ≥160 Elite, 140 Great, 115 Above Avg, 95 Average, 80 Below Avg, 65 Poor.
- References: Tango, Lichtman & Dolphin, The Book: Playing the Percentages in Baseball (2007); FanGraphs Library — wOBA and wRC+.