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MMA · Weight Classes

MMA Weight Class Calculator

Find your UFC/MMA weight class from your walk-around weight.

Find your weight class

Weight class

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Frequently asked questions

Why do MMA fighters cut weight?

To gain a size advantage — by dehydrating before weigh-ins and rehydrating before the fight, fighters can appear in a lighter weight class. ONE Championship now uses hydration testing to prevent this, requiring fighters to fight at their natural weight.

What's the most competitive UFC weight class?

Lightweight (155 lbs/70.3 kg) and Welterweight (170 lbs/77.1 kg) are historically considered the deepest divisions with the most elite talent.