Women's MMA Weight Classes in kg & lb: UFC, ONE & IMMAF (2026)

Contents

Women’s MMA uses the same pound limits as men’s, but far fewer divisions. The UFC has three active women’s weight classes: strawweight (115 lb / 52.2 kg), flyweight (125 lb / 56.7 kg) and bantamweight (135 lb / 61.2 kg). A fourth, featherweight (145 lb / 65.8 kg), has been vacant since 2023. Amateur IMMAF events offer eight women’s categories, from atomweight (47.6 kg) to super welterweight (79.4 kg). Below you’ll find every women’s class in kg and lb, the current UFC champions, a kg lookup table and what to know about making weight as a female fighter.

Limits and champions checked: 18 October 2026 (UFC rankings updated 10 October 2026). Confirm with your event’s current rulebook.

UFC women’s weight classes in kg and lb

In non-title bouts you can weigh in one pound over the limit. Title fights must be made at or under it (UFC, 2024). Champions are from the UFC’s rankings of 10 October 2026 (UFC, 2026).

Division	Limit (lb)	Limit (kg)	Non-title max	Champion (Oct 2026)
Strawweight	115	52.2	116 lb / 52.6 kg	Mackenzie Dern
Flyweight	125	56.7	126 lb / 57.2 kg	Natalia Silva
Bantamweight	135	61.2	136 lb / 61.7 kg	Kayla Harrison
Featherweight	145	65.8	146 lb / 66.2 kg	Vacant (not ranked)

The UFC has no women’s division below 115 lb or above 145 lb. A fighter who would be an atomweight (105 lb) under the Unified Rules has no UFC division to fight in.

What happened to UFC women’s featherweight?

Amanda Nunes held both the women’s bantamweight and featherweight titles. When she retired in 2023, both belts were vacated (UFC, 2023). Bantamweight got a new champion, but featherweight did not. The UFC still says it runs 12 weight classes, which includes women’s featherweight (UFC, 2024), yet its official rankings as of October 2026 have no women’s featherweight list (UFC, 2026).

Women’s classes under the Unified Rules

The Unified Rules of MMA, the official rulebook published by the ABC, list one set of 15 classes for all fighters. They don’t set separate limits for women (ABC, 2026). The classes most relevant to women’s MMA are the lighter ones:

Class	Range (lb)	Range (kg)
Atomweight	up to 105	up to 47.6
Strawweight	over 105 to 115	over 47.6 to 52.2
Flyweight	over 115 to 125	over 52.2 to 56.7
Bantamweight	over 125 to 135	over 56.7 to 61.2
Featherweight	over 135 to 145	over 61.2 to 65.8
Lightweight	over 145 to 155	over 65.8 to 70.3

The full list, up to super heavyweight, is in our MMA weight classes in kg chart.

ONE Championship women’s weight classes

ONE publishes a single ladder of ten classes and a single hydration-and-weigh-in rule written for every athlete, “he or she” (ONE Championship, 2026). The lighter end of that ladder looks like this:

ONE class	Over	Up to
Atomweight	105 lb (47.6 kg)	115 lb (52.2 kg)
Strawweight	115 lb (52.2 kg)	125 lb (56.7 kg)
Flyweight	125 lb (56.7 kg)	135 lb (61.2 kg)
Bantamweight	135 lb (61.2 kg)	145 lb (65.8 kg)

ONE’s names sit one step heavier than the UFC’s. ONE atomweight goes up to 115 lb, which is the UFC strawweight limit. You weigh in 24–48 hours before the event and must pass a urine specific gravity test (≤1.025) before your weight counts (ONE Championship, 2026).

Amateur women’s MMA weight classes (IMMAF)

IMMAF changed its categories at the October 2024 World Championships. For women it made no weight reductions. Instead it replaced welterweight with two new categories, super lightweight and super welterweight (IMMAF, 2024):

IMMAF women’s category	Limit
Atomweight	47.6 kg (105 lb)
Strawweight	52.2 kg (115 lb)
Flyweight	56.7 kg (125 lb)
Bantamweight	61.2 kg (135 lb)
Featherweight	65.8 kg (145 lb)
Lightweight	70.3 kg (155 lb)
Super lightweight	74.8 kg (165 lb)
Super welterweight	79.4 kg (175 lb)

That gives amateur women eight categories, compared with the UFC’s three active ones. IMMAF has no women’s category above 79.4 kg.

What weight class am I? Women’s kg lookup

Find your weigh-in weight. The kg figures are converted from the official pound limits and rounded to one decimal.

Weigh-in weight	UFC	Unified Rules	ONE	IMMAF (women)
up to 47.6 kg	—	Atomweight	—	Atomweight
over 47.6 to 52.2 kg	Strawweight	Strawweight	Atomweight	Strawweight
over 52.2 to 56.7 kg	Flyweight	Flyweight	Strawweight	Flyweight
over 56.7 to 61.2 kg	Bantamweight	Bantamweight	Flyweight	Bantamweight
over 61.2 to 65.8 kg	Featherweight (vacant)	Featherweight	Bantamweight	Featherweight
over 65.8 to 70.3 kg	—	Lightweight	Featherweight	Lightweight

So 55 kg (121.3 lb) is flyweight in the UFC and strawweight in ONE, and 60 kg (132.3 lb) is bantamweight in the UFC and flyweight in ONE.

This is your weight on the scale at the weigh-in, not your everyday weight. The ISSN advises combat athletes to stay roughly 12–15% above their division limit outside of camp (Ricci et al., 2025). That figure reflects pro practice, so amateurs should choose more conservatively.

Making weight as a female fighter

Weigh-in rules are the same for women as for men. What can differ is how your body responds across the month. The ISSN’s position stand on female athletes makes two points that matter for weight classes (Sims et al., 2023):

• Hormone profiles are individual and can be unpredictable. The ISSN recommends that female athletes of reproductive age track their hormonal status against training and recovery to learn their own patterns. One practical way to do that is to log your cycle alongside your morning weight, so you can see whether your weight swings follow a pattern before you pick a class.
• Energy comes first. The primary nutritional priority is eating enough to meet energy needs and keep energy availability adequate. A class you can only make by under-eating for weeks works against training and health.

For the cut itself, the ISSN’s combat-sports position stand describes supervised acute water loss of about 2–4% of body mass within 24 hours of weigh-in as the optimal range (Ricci et al., 2025). The ACSM consensus recommends setting a minimum competition weight based on body composition and banning unhealthy weight-loss methods (Burke et al., 2021).

How to choose your weight class

1. Measure your baseline. Average two weeks of morning weights at normal training intake, and note where you are in your cycle.
2. Check which divisions exist. In the UFC, a fighter who walks around well above 145 lb has no women’s division to drop into, while IMMAF goes up to 79.4 kg.
3. Pick the class you can make with a planned reduction, not the lightest one you can survive.
4. Amateurs: go up if in doubt. Your first fights are for learning, not for winning the scale.

The weight cut calculator shows the weekly pace you’d need for a given class and fight date. Then read how much weight you can safely cut, how to cut weight for a fight and rehydrating after the weigh-in. For the men’s divisions and every Unified Rules class, see MMA weight classes in kg.

MyFightPrep tracks your weight trend toward the class limit and fight date, so you can see early whether a division is realistic — free during the beta.

Important

This guide is general information, not medical advice. Weight classes and weigh-in rules vary by commission and promotion, so confirm them in your bout agreement or rulebook. Rapid dehydration can be dangerous. Never use diuretics, laxatives, vomiting or sweat suits to make weight, and stop if you feel dizzy, confused, faint or cramp up. If your period stops or becomes irregular during a weight cut, talk to a doctor. Amateurs and young fighters should avoid water cuts and choose their class with a coach and a doctor.

Frequently asked questions

What are the women's weight classes in MMA?

The UFC has three active women's divisions: strawweight (115 lb / 52.2 kg), flyweight (125 lb / 56.7 kg) and bantamweight (135 lb / 61.2 kg). Its women's featherweight (145 lb / 65.8 kg) has been vacant since 2023. Amateur IMMAF events have eight women's categories from atomweight (47.6 kg) to super welterweight (79.4 kg).

Does the UFC still have women's featherweight?

Not as an active division. The women's featherweight title was vacated when Amanda Nunes retired in 2023, and as of October 2026 the UFC's official rankings list no women's featherweight division. The UFC still counts it among its 12 weight classes.

What weight class is 55 kg in women's MMA?

55 kg is 121.3 lb, which is flyweight in the UFC, under the Unified Rules and at IMMAF (limit 125 lb / 56.7 kg). In ONE Championship, 55 kg is strawweight (over 115 to 125 lb).

What weight class is 60 kg in women's MMA?

60 kg is 132.3 lb, which is bantamweight in the UFC, under the Unified Rules and at IMMAF (limit 135 lb / 61.2 kg). In ONE Championship, 60 kg is flyweight (over 125 to 135 lb).

Who are the current UFC women's champions?

According to the UFC's rankings of 10 October 2026: Mackenzie Dern (strawweight), Natalia Silva (flyweight) and Kayla Harrison (bantamweight). Women's featherweight is vacant. Titles change often, so check UFC.com.

Are women's MMA weight limits different from men's?

No. The pound limits are the same: a 125 lb flyweight limit applies to men and women alike. The Unified Rules list one set of classes for all fighters. What differs is which divisions each promotion offers women, for example the UFC has none above 135 lb.

Sources

This guide is based on the works below. Numbers in the text refer to them.

1. UFC (2026). UFC Athlete Rankings (last updated 10 October 2026)
2. UFC (2024). Understanding UFC Weight Classes and Weigh-Ins
3. UFC (2023). Reviewing Each UFC Champion's Journey in 2023
4. Association of Boxing Commissions and Combative Sports (ABC) (2026). Unified Rules of Mixed Martial Arts (amended with rule changes 5 August 2026)
5. ONE Championship (2026). ONE Championship Martial Arts: Weight Classes and Hydration Testing
6. International Mixed Martial Arts Federation (IMMAF) (2024). IMMAF to introduce cutting edge weight management policy starting with World Championships in Uzbekistan
7. Sims ST, Kerksick CM, Smith-Ryan AE, et al. (2023). International Society of Sports Nutrition Position Stand: Nutritional Concerns of the Female Athlete
8. Ricci AA, Evans C, Stull C, et al. (2025). International Society of Sports Nutrition Position Stand: Nutrition and Weight Cut Strategies for Mixed Martial Arts and Other Combat Sports
9. Burke LM, Slater GJ, Matthews JJ, Langan-Evans C, Horswill CA (2021). ACSM Expert Consensus Statement on Weight Loss in Weight-Category Sports