National Averages Indicate 90 to 94 Lbs.
According to Body Mass Index calculators, a 4-foot-7 American weighing 90 lbs. has a BMI of 20.9, which is considered normal for adults of that height. The average adult, male or female, of that height should weigh 80 to 107 lbs., according to the Centers for Disease Control and Prevention. The Halls MD website indicates that a 4-foot-7 female over the age of 50 should weigh 82 to 108 lbs., but that the average woman of this height and age is 94 lbs.
There Are Exceptions to Consider.
Women who are very small-framed or large-framed may fall outside of this range, but will still be considered to have a healthy body weight. Similarly, muscle is heavier than fat and females who are 4-foot-7 but get plenty of exercise to build muscle tone may weight more than their less-active counterparts, but be in much better shape.
Body Mass Index calculators, which are the most common tool for determining a healthy height vs. weight ratio, do not take into consideration several factors that may affect weight, such as a large or tiny frame. The range given by these calculators are a good guideline, but large-framed, small-framed and very muscular people people may be slightly under or above this range.