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...Do identical twins share the same fingerprints?How do your body parts measure up?How do you stop the hiccups?The first heart transplantHow fast is a sneeze?