Find your exact weight class in professional Boxing, MMA/UFC, and Muay Thai with our comprehensive weight class calculator and complete divisions chart
Select your weight, preferred unit, gender, and the combat sports you're interested in to find your professional weight class
Interactive polls, predictions, and daily boxing quiz • Updated 6/26/2025, 5:11:11 AM
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Watch this quick explainer video to understand weight divisions
The original UFC had no weight classes - it was truly 'no holds barred' until safety regulations introduced weight divisions in UFC 12.
Boxing weight classes ensure fair competition by matching fighters of similar size and weight. This safety measure prevents significant physical mismatches and creates more competitive, entertaining fights for fans.
Professional boxing organizations like WBC, WBA, IBF, and WBO all recognize the same weight divisions, making our calculator accurate across all major boxing promotions.
Professional boxing features 17 weight classes for men and 16 for women, from Minimumweight (105 lbs) to Heavyweight (200+ lbs). Each division has strict weight limits enforced at weigh-ins.
MMA has 9 men's divisions and 6 women's divisions. UFC weight classes range from Flyweight (125 lbs) to Super Heavyweight (265+ lbs), with some organizations having additional categories.
Muay Thai follows similar divisions to boxing with 17 weight classes for men and 15 for women, though some organizations may have slight variations in weight limits.
In professional boxing and MMA, fighters must make weight for their specific division. However, fighters can move up or down weight classes between fights, though this requires careful planning and training.
Missing weight can result in fines, title stripping, or fight cancellation. Most professional organizations allow a small margin (usually 1-2 lbs) and may offer a short window to cut additional weight.
Major boxing organizations (WBC, WBA, IBF, WBO) use standardized weight limits. MMA organizations like UFC, Bellator, and ONE Championship also follow similar divisions, though some regional variations exist.
Live odds and betting lines for upcoming boxing matches
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