Weight Class Finder: Boxing, MMA, Wrestling, Judo, Taekwondo

How to use it

Choose the Competition: the sport and, for the Olympic sports, the men's or women's table.
Type Your weight and choose kilograms or pounds in Unit.
Read the Weight class and the Upper limit of that class. The All classes of this competition table marks your class.

How the class is found

Each table lists the classes from the lightest, with an upper limit for each. The weight is converted into the unit of the table and placed in the first class whose limit is at or above it. A class with no limit is open-ended, and takes every weight above the limit of the class before it.

Pounds are converted with the exact value 1 lb = 0.45359237 kg. The professional and mixed martial arts tables are in pounds, so the pound limit decides a weight that is near a limit; the kilogram figures in the sources are rounded.

Weight class = the first class whose upper limit is at or above your weight (in the unit of the table)
1 lb = 0.45359237 kg

Where each table comes from

Professional boxing: Wikipedia, Boxing weight classes (page last edited 9 October 2026). The limit of each class is the top of its pound range in the table.
Olympic boxing: Wikipedia, Boxing at the 2024 Summer Olympics (page last edited 14 December 2025). The page cites the International Olympic Committee article of 31 May 2022 for the categories.
Mixed martial arts: Wikipedia, Mixed martial arts weight classes (page last edited 9 February 2026), which gives the divisions of the Unified Rules as a table in pounds.
Olympic wrestling: Wikipedia, Wrestling at the 2024 Summer Olympics. The page shows no edit date; its latest reference was retrieved on 13 July 2024.
Judo: Wikipedia, Judo at the 2024 Summer Olympics (page last edited 20 December 2025).
Taekwondo: Wikipedia, Taekwondo at the 2024 Summer Olympics (page last edited 12 August 2025).
The rule books of the governing bodies were not opened for this tool. Check the current rule book of the body that runs your competition before a weigh-in.

What this finder does not cover

Catchweights, which are bouts at a weight the fighters agree rather than a class limit. The boxing article notes that a nonstandard weight limit is called a catchweight.
Weigh-in times, the penalties for being over the limit, and any rule on rehydration. These differ by body and are not calculated.
Age groups, amateur and junior divisions, and national rules that use other limits.
Women's mixed martial arts: the Wikipedia page says that women's limits mostly follow the Unified Rules limits, so the finder shows the one table for mixed martial arts.

Worked example: 66 kg in professional boxing

66 kg is 66 ÷ 0.45359237 = 145.5 lb. The light welterweight limit is 140 lb (63.5 kg), which is below that weight, and the welterweight limit is 147 lb (66.7 kg), which is at or above it. So 66 kg is in the welterweight class.

Type 66.7 kg instead. That is 147.05 lb, which is above 147 lb, so the finder gives the light middleweight class, with an upper limit of 154 lb (69.9 kg). The pound limit decides the class, not the rounded kilogram figure.

Weight typed	Class	Upper limit
66 kg (145.5 lb)	Welterweight	147 lb (66.7 kg)
66.7 kg (147.0 lb)	Light middleweight	154 lb (69.9 kg)

Frequently asked questions

What if my weight is exactly on a limit?

The finder puts a weight exactly on a limit in the class with that limit. For professional boxing the source says a boxer's weight must not exceed the limit, which gives the same answer. For the other sports the source does not state the rule, so check the governing body's rules.

Why do the professional and Olympic boxing classes differ?

They come from different bodies. The professional table gives the limits used by the WBA, WBC, IBF and WBO, in pounds, with names such as super flyweight. Olympic boxing has its own classes in kilograms, as set for the 2024 Games.

Why does the finder show both pounds and kilograms?

Professional boxing and mixed martial arts limits are published in pounds, and the Olympic sports use kilograms. Each limit is shown in both units, but the decision is made in the unit of the table.

Does the weight I type have to be my weigh-in weight?

The finder classes whatever weight you type. Your official class is decided under the rules at the weigh-in, which can differ from your usual weight, so type the weight you expect to make.

Is there a separate women's class in mixed martial arts?

The Wikipedia page on mixed martial arts weight classes says women's limits mostly follow the Unified Rules limits, and women's titles are usually in the lower classes. The finder therefore shows the one table for mixed martial arts.

Sources

Figures and text last checked on Tuesday, November 10, 2026.

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