Combat Sports Weight Classes (kg & lb): 2026 Chart

Contents

Every combat sport splits fighters into weight classes, and the limits differ between sports and even between organisations in the same sport. The UFC uses 125 lb to 265 lb for men, the WBC lists 18 professional boxing divisions from 105 lb up, and amateur bodies such as IFMA (Muay Thai), WAKO (kickboxing), World Boxing and IBJJF’s European events work in kilograms. Below are the official charts, in kg and lb, and how to choose the class that fits your body.

Limits checked: September 2026 — confirm with your event’s current rulebook. Kilogram or pound values in brackets are conversions (1 lb = 0.4536 kg), rounded to one decimal.

Why your weight class matters

Your weight class decides how big your opponent can be, and how much you have to lose to get there. Pick too low and you spend camp hungry and flat instead of training. Pick too high and you may face bigger, stronger opponents.

The ACSM consensus on weight-category sports points out that more classes with smaller gaps help athletes find a division that suits their natural physique, but can also tempt them to cut down to the next one (Burke et al., 2021). The goal is a class you can make without an extreme cut.

MMA weight classes (UFC)

The UFC uses the pound limits below. Weigh-ins are the day before the fight, and non-title bouts allow a one-pound allowance above the limit; title fights don’t (UFC, 2024).

Division	Limit (lb)	Limit (kg)	UFC divisions
Strawweight	115	52.2	Women
Flyweight	125	56.7	Men & women
Bantamweight	135	61.2	Men & women
Featherweight	145	65.8	Men
Lightweight	155	70.3	Men
Welterweight	170	77.1	Men
Middleweight	185	83.9	Men
Light heavyweight	205	93.0	Men
Heavyweight	265	120.2	Men

The Unified Rules of MMA define more classes than the UFC uses, and amateur (IMMAF) and ONE Championship events have their own charts. See all of them in our MMA weight classes in kg guide.

Professional boxing weight classes

Professional boxing has the most divisions of any combat sport. The WBC lists 18, adding bridgerweight between cruiserweight and heavyweight (WBC, 2026). Without bridgerweight, you get the 17 classes usually quoted.

Division	Limit (lb)	Limit (kg)
Strawweight / minimumweight	105	47.6
Light flyweight	108	49.0
Flyweight	112	50.8
Super flyweight	115	52.2
Bantamweight	118	53.5
Super bantamweight	122	55.3
Featherweight	126	57.2
Super featherweight	130	59.0
Lightweight	135	61.2
Super lightweight	140	63.5
Welterweight	147	66.7
Super welterweight	154	69.9
Middleweight	160	72.6
Super middleweight	168	76.2
Light heavyweight	175	79.4
Cruiserweight	200	90.7
Bridgerweight (WBC)	224	101.6
Heavyweight	over 200 (over 224 at the WBC)	over 90.7 (over 101.6 at the WBC)

Amateur (Olympic-style) boxing weight classes

World Boxing uses 10 classes each for men and women at its World Championships and World Boxing Cup (World Boxing, 2025).

Men	Limit	Women	Limit
Flyweight	50 kg (110.2 lb)	Light flyweight	48 kg (105.8 lb)
Bantamweight	55 kg (121.3 lb)	Flyweight	51 kg (112.4 lb)
Lightweight	60 kg (132.3 lb)	Bantamweight	54 kg (119.0 lb)
Welterweight	65 kg (143.3 lb)	Featherweight	57 kg (125.7 lb)
Light middleweight	70 kg (154.3 lb)	Lightweight	60 kg (132.3 lb)
Middleweight	75 kg (165.3 lb)	Welterweight	65 kg (143.3 lb)
Light heavyweight	80 kg (176.4 lb)	Light middleweight	70 kg (154.3 lb)
Cruiserweight	85 kg (187.4 lb)	Middleweight	75 kg (165.3 lb)
Heavyweight	90 kg (198.4 lb)	Light heavyweight	80 kg (176.4 lb)
Super heavyweight	over 90 kg	Heavyweight	over 80 kg

National federations and youth events may differ. Details in our amateur boxing weight classes guide.

Muay Thai weight classes (IFMA)

IFMA (International Federation of Muaythai Associations) uses these Elite (senior) categories in its Rules & Regulations v3.057 (IFMA, 2026). A men’s 45 kg class exists for multi-sport events only:

Senior men	Senior women
48, 51, 54, 57, 60, 63.5, 67, 71, 75, 81, 86, 91 kg, +91 kg	45, 48, 51, 54, 57, 60, 63.5, 67, 71, 75 kg, +75 kg

The gaps are 3 kg in the lighter classes and grow to 4–6 kg further up. Professional promotions set their own limits. More detail in our Muay Thai weight classes chart.

Kickboxing weight classes (WAKO)

WAKO’s ring disciplines (full contact, low kick, K-1 style) use these senior categories for ages 19–40, and a kickboxer can enter at most one division above their actual weight (WAKO, 2022):

Senior men (ring)	Senior women (ring)
−51, −54, −57, −60, −63.5, −67, −71, −75, −81, −86, −91 kg, +91 kg	−48, −52, −56, −60, −65, −70 kg, +70 kg

Tatami disciplines (point fighting, light contact, kick light) use a different set of categories. See our kickboxing weight classes guide for more.

BJJ weight classes (IBJJF, gi)

IBJJF weighs you with your gi on, so your limit includes the weight of the gi. The adult and masters limits below are IBJJF’s own figures: kg from its European Championship chart (IBJJF, European 2027) and lb from its US Open chart (IBJJF, New Jersey Fall Open 2026). The lb values are not exact conversions of the kg values, so use the chart in the unit your event weighs in:

Division	Men (lb / kg)	Women (lb / kg)
Rooster	127.0 / 57.5	107.0 / 48.5
Light feather	141.6 / 64.0	118.0 / 53.5
Feather	154.6 / 70.0	129.0 / 58.5
Light	168.0 / 76.0	141.6 / 64.0
Middle	181.6 / 82.3	152.6 / 69.0
Medium heavy	195.0 / 88.3	163.6 / 74.0
Heavy	208.0 / 94.3	175.0 / 79.3
Super heavy	222.0 / 100.5	No limit
Ultra heavy	No limit	—

No-gi events use a separate, lower list, and you weigh in wearing your no-gi uniform. Our BJJ weight classes guide covers both.

Weigh-in rules that change the picture

The limit is only half the rule; when and how you weigh in matters just as much. A few examples:

• UFC: weigh-in the morning before fight night, with a one-pound allowance for non-title bouts (UFC, 2024).
• Pro MMA and pro boxing in general: the gap between weigh-in and fight can be up to 32 hours, which the ACSM links to a culture of extreme cutting and regaining, with average regains of up to 10% of body mass reported (Burke et al., 2021).
• Second-day checks: according to the ACSM statement, judo and taekwondo re-weigh selected athletes on the morning of competition and exclude anyone more than 5% over the limit, and the IBF applies a re-weigh limit of 10 lb (4.5 kg) above the class limit for championship bouts (Burke et al., 2021).
• WAKO: you may enter at most one division above your actual weight (WAKO, 2022).

Before you commit to a class, read how your event handles the weigh-in, not just the number.

How do you choose the right weight class?

Choose the class you can reach with a gradual diet plus a small, planned water cut, not the lowest class you can survive. Three numbers from the ISSN position stand give you a frame (ISSN, 2025):

• Off-camp weight: outside fight camp, stay roughly 12–15% above your division limit.
• Camp pace: during camp, lose about 0.5–1 kg per week.
• Final days: suitable acute losses are listed as up to about 6.7% at 72 hours, 5.7% at 48 hours and 4.4% at 24 hours before the weigh-in.

Then check against the rules of your event:

1. When is the weigh-in? A day-before weigh-in (UFC-style) allows some water cut and refill. A same-day weigh-in shortly before you compete leaves little or no time to recover, so you should already be close to the limit.
2. How many times do you weigh in? Tournaments with daily weigh-ins mean you have to make weight again and again.
3. Your training weight in camp. If you can only hit the limit by sweating off large amounts, you’re aiming too low.

The ACSM statement recommends setting a minimum competition weight from your body composition and banning unsafe methods, and notes that some organisations, including ONE Championship and the California State Athletic Commission, have changed their rules to curb extreme cutting (Burke et al., 2021).

Want your own numbers? The weight cut calculator shows the weekly pace you’d need and what’s left for fight week.

For the concrete maths, see how much weight you can cut. If this is your first cut, start with weight cutting for beginners.

MyFightPrep shows whether your chosen weight class is realistic from your daily weight trend and fight date — free.

Important

This guide is general information, not medical advice. Rules change, and promotions and national federations can set their own limits and weigh-in times, so always confirm with your event’s current rulebook. Choose your weight class together with your coach, and pick too high rather than too low, especially for your first fight. Minors should compete at or near their natural weight and never use dehydration to make weight.

Frequently asked questions

What are the 17 weight classes in boxing in order?

From lightest: strawweight/minimumweight (105 lb), light flyweight (108), flyweight (112), super flyweight (115), bantamweight (118), super bantamweight (122), featherweight (126), super featherweight (130), lightweight (135), super lightweight (140), welterweight (147), super welterweight (154), middleweight (160), super middleweight (168), light heavyweight (175), cruiserweight (200) and heavyweight. The WBC also lists an 18th division, bridgerweight (up to 224 lb), which moves its heavyweight to over 224 lb.

What weight is each weight class in UFC?

UFC men's divisions are flyweight 125 lb (56.7 kg), bantamweight 135 lb (61.2 kg), featherweight 145 lb (65.8 kg), lightweight 155 lb (70.3 kg), welterweight 170 lb (77.1 kg), middleweight 185 lb (83.9 kg), light heavyweight 205 lb (93.0 kg) and heavyweight 265 lb (120.2 kg). Women compete at strawweight 115 lb (52.2 kg), flyweight 125 lb and bantamweight 135 lb. Non-title fights allow one pound over the limit.

What weight class is 170 pounds in Muay Thai?

170 lb is about 77.1 kg. Under IFMA's amateur rules, that falls in the 81 kg class (over 75 kg, up to 81 kg) for senior men. Pro promotions set their own limits, so check the event's rules.

What is the easiest weight class in boxing?

There isn't one that's objectively easiest. The easiest class for you is the one closest to your normal, well-fed training weight, because it lets you spend camp training instead of cutting. Boxing's narrow gaps between divisions make that easier to find than in sports with fewer classes.

Sources

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

1. UFC (2024). Understanding UFC Weight Classes and Weigh-Ins
2. World Boxing Council (WBC) (2026). The WBC presents the professional boxing divisions
3. World Boxing (2025). World Boxing publishes competition calendar for 2025
4. International Federation of Muaythai Associations (IFMA) (2026). IFMA Muaythai Rules & Regulations (v3.057, revised 11 May 2026)
5. World Association of Kickboxing Organizations (WAKO) (2022). WAKO Rules v.2 (04.05.2022), Chapter 7: Ring rules, Article 3 Weight categories
6. International Brazilian Jiu-Jitsu Federation (IBJJF) (2026). European IBJJF Jiu-Jitsu Championship 2027 – event information and gi weight chart (kg)
7. International Brazilian Jiu-Jitsu Federation (IBJJF) (2026). New Jersey Fall International Open IBJJF Jiu-Jitsu Championship 2026 – event information and gi weight chart (lb)
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