An average 16-year-old boy weighs 130-150 pounds, while an average 16-year-old girl weighs 115-120 pounds, notes Disabled World. The complete range for the average teenager’s weight is 95 pounds at the third percentile to 185 pounds at the 97th percentile for girls and 103 to 195 pounds for boys.
An individual’s relative weight is dependent on his height and body mass. The table of average height and weight of children and adults only lists estimate measurements, explains Disabled World. Kids and teenagers experience growth spurts, and they usually gain and lose weight rapidly and irregularly. The average weight per age can be used as reference along with body mass index calculations to monitor a child’s development.