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 do people from Scotland have Ginger Hair?The first heart transplantWho discovered X-rays?How do you stop the hiccups?What scanning techniques are used for?