⚖️ Boxing Weight Class Calculator
Enter a fighter's weight in pounds to see the professional boxing division they fall into — from minimumweight up to heavyweight, based on the recognised division limits.
⚖️ Find the Division
What is a Boxing Weight Class Calculator?
Boxing matches fighters of similar size so bouts are fair and safe, and it does that with weight divisions. Each division is defined by an upper weight limit; this tool takes a weight in pounds and returns the lowest division that weight still qualifies for — the same way a boxer is classified at the weigh-in.
Use it to see where you or a favourite fighter sits, to understand what a "move up in weight" really means, or to sanity-check a matchmaking idea. It uses the professional limits, so for amateur or Olympic bouts check that governing body's own categories.
❓ Frequently Asked Questions
How does the boxing weight class calculator work?
Enter a fighter's weight in pounds and it returns their professional division. Each division has an upper weight limit, and a boxer belongs to the lowest division whose limit their weight does not exceed — so a 147 lb fighter is a welterweight. Anyone over the 200 lb cruiserweight limit is a heavyweight, which has no upper bound.
How many weight classes are there in professional boxing?
Modern professional boxing recognises 17 divisions, from minimumweight (105 lbs) up through the flyweights, bantamweights, featherweights, lightweights, welterweights, middleweights and light heavyweights to cruiserweight (200 lbs) and, above that, the open-ended heavyweight class.
Are amateur and professional weight classes the same?
No. Amateur and Olympic boxing use their own, smaller set of weight categories with different limits, and they change from time to time. This calculator uses the professional division limits, so treat it as a guide for the pro ranks and check the amateur governing body's chart for amateur bouts.
Why do boxers move between weight classes?
Fighters change divisions to chase titles, find fresh match-ups, or fight at a weight where they carry power and stay healthy. Moving up can add strength but reduce speed, while moving down often means a hard cut. A boxer who wins belts in several divisions is called a multi-weight world champion.