What is the average weight of a 5' 2 15-year-old?

Weight calculation: The typical way the weight is estimated for girls is 100 pounds for first 5 feet and then 5-6 pounds per inch; for boys, use 110 pounds for the first 5 feet and then 7-8 pounds for each inch. Therefore, 5'2" girl would average 110-112 pounds; for a boy, the average would be 124-126 pounds. That can vary based on body type and bone size, but that gives you a ballpark estimate.