All 17 Boxing Weight Classes — lbs & kg
The four major sanctioning bodies all use the same weight limits; only the names differ. Heavyweight has no upper limit, while Bridgerweight (224 lbs / 101.6 kg) is recognised only by the WBC (since 2020) and the WBA's "Super Cruiserweight" (since 2023).
| Weight Class | Max (lbs) | Max (kg) |
|---|---|---|
| Minimumweight (Strawweight) | 105 lbs | 47.6 kg |
| Light Flyweight | 108 lbs | 49.0 kg |
| Flyweight | 112 lbs | 50.8 kg |
| Super Flyweight | 115 lbs | 52.2 kg |
| Bantamweight | 118 lbs | 53.5 kg |
| Super Bantamweight | 122 lbs | 55.3 kg |
| Featherweight | 126 lbs | 57.2 kg |
| Super Featherweight | 130 lbs | 59.0 kg |
| Lightweight | 135 lbs | 61.2 kg |
| Super Lightweight | 140 lbs | 63.5 kg |
| Welterweight | 147 lbs | 66.7 kg |
| Super Welterweight | 154 lbs | 69.9 kg |
| Middleweight | 160 lbs | 72.6 kg |
| Super Middleweight | 168 lbs | 76.2 kg |
| Light Heavyweight | 175 lbs | 79.4 kg |
| Cruiserweight | 200 lbs | 90.7 kg |
| Heavyweight | 200+ lbs | 90.7+ kg |
| Bridgerweight* | 224 lbs | 101.6 kg |
How Weight Classes Work in Boxing
Fighters must weigh in at or below their division's limit, usually the day before the fight. The 17-division structure was formally standardised by the four major bodies in 2015. The WBC, WBA, WBO and IBF use the same weight limits — what changes is the name. The lowest division, Minimumweight (105 lbs / 47.6 kg), is most active in Japan, Thailand and the Philippines.
Heavyweight: The Division with No Upper Limit
Heavyweight starts at 200+ lbs (90.7+ kg) and has no ceiling. In the 2025 Usyk vs Dubois II rematch, Oleksandr Usyk weighed 227.3 lbs (103.1 kg) and Daniel Dubois 243.8 lbs (110.5 kg). Modern heavyweights typically compete in a 215–260 lb range — see our heavyweight weight guide for full numbers.
Why Two Systems? Pounds vs Kilograms
Boxing limits are written in pounds because the sport's modern rules were codified in the English-speaking world. Kilograms are listed alongside for international consistency — particularly in Europe, Asia and Latin America where metric is standard. The conversion is fixed: divide pounds by 2.20462 to get kilograms.
How to Find Your Boxing Weight Class
Find the lowest division whose limit is at or above your current weight. If you weigh 150 lbs, you'd compete at Super Welterweight (154 lbs) without cutting weight, or Welterweight (147 lbs) if you make a small cut. Use the interactive calculator on the home page for an instant answer.