The weight limit for professional boxing’s light heavyweight division is 175 pounds.
Professional light heavyweights must weigh no more than 175 pounds, or about 79.4 kilograms, at the official weigh-in. The division generally sits above super middleweight, whose limit is 168 pounds, and below cruiserweight, which begins above 175 pounds in the standard professional structure.
The class was standardized in 1920 with a maximum weight of 175 pounds. Before cruiserweight boxing was created in 1979, fighters above the light heavyweight limit moved directly into heavyweight competition. The newer division gave athletes between the traditional light heavyweight and heavyweight ranges another championship pathway.
The 175-pound figure refers to the upper limit, not a single required body weight. A boxer can weigh less than 175 pounds and still compete as a light heavyweight, provided the bout and sanctioning rules permit it. Amateur boxing uses different historical classifications, which is why some references mention a 178-pound light-heavyweight limit. That figure should not be substituted for the professional limit asked here.