On average a cheetah's weight is between 77-158 lbs. On the average males are larger than females. Newly born cubs only weigh about 8-11 oz. The adult cheetah weighs from 40 … to 65 kg (88 to 140 lb). Its total body length is from 115 to 135 cm (45 to 53 in), while the tail can measure up to 84 cm (33 in) in length.