Boxing Weight Class Calculator
Boxing's 17 professional weight divisions provide a structured framework ensuring fighters compete against opponents of similar size and weight. From the minimumweight (strawweight) division at a maximum of 105 lb up to the unlimited heavyweight class, each division has precise maximum weight limits recognised by all four major sanctioning bodies (WBC, WBA, IBF, WBO). This calculator takes your body weight in pounds or kilograms and returns your current boxing division, the division limit, how much you are above or below the limit, and the adjacent weight classes above and below for comparison.
Professional boxing weight divisions
Minimumweight: up to 105 lb (47.6 kg)
Light flyweight: up to 108 lb (49.0 kg)
Flyweight: up to 112 lb (50.8 kg)
Super flyweight: up to 115 lb (52.2 kg)
Bantamweight: up to 118 lb (53.5 kg)
Super bantamweight: up to 122 lb (55.3 kg)
Featherweight: up to 126 lb (57.2 kg)
Super featherweight: up to 130 lb (59.0 kg)
Lightweight: up to 135 lb (61.2 kg)
Super lightweight: up to 140 lb (63.5 kg)
Welterweight: up to 147 lb (66.7 kg)
Super welterweight: up to 154 lb (69.9 kg)
Middleweight: up to 160 lb (72.6 kg)
Super middleweight: up to 168 lb (76.2 kg)
Light heavyweight: up to 175 lb (79.4 kg)
Cruiserweight: up to 200 lb (90.7 kg)
Heavyweight: over 200 lb (no limit)
Frequently asked questions
How many weight classes are there in boxing?
There are 17 recognised weight classes in professional boxing, from minimumweight (up to 105 lb / 47.6 kg) to heavyweight (unlimited). The four major sanctioning bodies (WBC, WBA, IBF, WBO) all recognise these same 17 divisions.
What is the heavyweight limit in boxing?
There is no upper weight limit in the heavyweight division. There is a cruiserweight division capped at 200 lb (90.7 kg), and heavyweight covers everyone above that. Some fighters in the heavyweight division compete at 260 to 270 lb or more.
How are boxing weight classes different from wrestling or MMA?
Boxing weight classes are based on the maximum weight a fighter can be at the official weigh-in, which typically occurs the day before the fight. This creates the common practice of rehydrating after the weigh-in, especially in lighter divisions. MMA and wrestling also allow this but have slightly different class structures.
What weight should I box at as an amateur?
Amateur boxing uses similar but not identical weight classes to professional boxing, governed by World Boxing (formerly AIBA) and USA Boxing. Compete as close to your natural, well-hydrated body weight as possible to minimise health risk and avoid performance-compromising dehydration.
Can I move between weight classes as a boxer?
Yes. Moving up a weight class is common as fighters gain weight and muscle with age. Moving down (making weight) requires careful planning. Many champions have competed in multiple weight classes over their careers. Each class change requires adjustment to competition style and opponent size.
Official sources
- World Boxing Council: WBC Weight Classes and Rankings.
- USA Boxing: USA Boxing Rules and Regulations.
Reviewed by the CalculatorHub team, edited by James Graham, 14 June 2026. See our methodology.