Men compete in eight UFC weight classes: Flyweight (125 lb), Bantamweight (135 lb), Featherweight (145 lb), Lightweight (155 lb), Welterweight (170 lb), Middleweight (185 lb), Light Heavyweight (205 lb) and Heavyweight (265 lb). Women's divisions have run from Strawweight (115 lb) through Flyweight (125 lb) and Bantamweight (135 lb) to Featherweight (145 lb). Each figure is the maximum weight at the official weigh-in; non-title bouts allow one pound over.
Which UFC division has the highest knockout rate?
Heavyweight posts the highest knockout rate, and the table on this page shows it. With four-ounce gloves and fighters weighing up to 265 pounds, even a glancing shot can end a bout. As you move down the weight classes, fights more often go the distance or end by submission rather than a single clean knockout.
How are these division percentages calculated?
Each percentage is a share of the DECIDED bouts in that weight class - bouts with a winner - so draws and no contests sit outside it, the same basis our finish rate analytics page uses. KO/TKO, submission and decision do not quite add to 100% because disqualifications and other rare endings belong to none of them. The Total Fights figure counts every bout actually fought, draws and no contests included, and Title Fights counts undisputed title bouts only - interim and BMF belts are not included.
Why do lighter divisions tend to have more decisions?
Lighter fighters carry less one-punch power relative to their durability and recovery, and their cardio lets them survive damage and push a high pace across all three or five rounds. The result is more competitive, technical battles that frequently reach the judges instead of ending early.
How often are these weight-class numbers updated?
They are computed from our UFC results, so they update as each event's official results are recorded. Every figure covers all UFC history; a bout that has only been booked is not counted until it has been fought. The Peak ELO on each card is MMA.SOCIAL's own rating, not an official UFC ranking.
Understanding UFC weight classes
The UFC features multiple weight divisions, each with its own unique characteristics and fighting styles. Weight classes ensure fair competition and create distinct strategic elements in each division.
Men's divisions
Heavyweight (265 lbs): The division of big punchers, with the highest KO rate in the UFC.
Light Heavyweight (205 lbs): A blend of power and athleticism with legendary champions.
Middleweight (185 lbs): Often considered the most well-rounded division.
Welterweight (170 lbs): Historically one of the deepest and most competitive divisions.
Lightweight (155 lbs): The most popular division, known for technical excellence.
Featherweight (145 lbs): Fast-paced action with elite striking.
Bantamweight (135 lbs): Technical, high-paced fights - more of them go to the judges than end inside the distance.
Flyweight (125 lbs): The fastest fighters with incredible cardio.
Women's divisions
Women's MMA has grown significantly, with divisions from Strawweight (115 lbs) to Featherweight (145 lbs), showcasing world-class athletes and exciting matchups.