Average Weight of a Woman Research shows that the average weight of women in the UK is 10 stone 3.5lbs. The average weight in 1951 was 9 stone 10lbs. In America, the average weight for women is 11 stone 1.5lbs. Other interesting facts...Why does our body need muscles?How fast is a sneeze?How do your body parts measure up?Save a LifeIs there any benefit to eating chocolate?