Middleweight Weight Limit
The middleweight limit is exactly 160 lb, which is 72.6 kg. This guide covers the rule itself, the divisions on either side, and the weight-making process that can quietly shape a fight and its price. A drained fighter who barely made the limit is not the same fighter on the night, which is why the weigh-in matters to bettors as well as to the boxers. Live prices stay in the sportsbook.
The limit and the divisions around it
A middleweight must weigh no more than 160 lb (72.6 kg) at the official weigh-in, which is normally held the day before the fight. Directly below sits welterweight at 147 lb (66.7 kg), and directly above sits super-middleweight at 168 lb. The day-before weigh-in is the key detail: it gives fighters roughly a day to rehydrate, so a boxer can step into the ring well above the divisional limit. That gap between weigh-in weight and fight-night weight is part of what makes 160 lb a distinct contest.
Cuts, rehydration and catchweights
Most middleweights cut weight to make the limit, shedding fluid in the final days and then rehydrating after the weigh-in. A fighter who struggles to make 160 lb, or who drains badly to get there, can look slower and weaker on the night, and the market sometimes moves on a difficult weigh-in. Occasionally two fighters agree a catchweight, a contracted limit between two divisions, so a bout can be made without one of them having to move weight class fully. When you see a catchweight or a missed-weight story, it is worth checking the method of victory and over/under rounds markets, since a drained fighter changes how a fight is likely to play out.
Frequently asked questions
What is the exact middleweight weight limit?
160 lb, which converts to 72.6 kg. A fighter must be at or under that weight at the official weigh-in, normally held the day before the fight.
What is a catchweight?
A contracted weight limit agreed between two fighters that sits between two recognised divisions. It lets a bout be made without one boxer having to change weight class fully.