At age 13, most teenagers are well into puberty and may be in the middle of or about to embark on growth spurts. Their height and weight may go through many changes in their teen years.
Average height and weight for 13-year-old girls
According to the Centers for Disease Control, the average height for a 13-year-old girl is 1.57 m (5 foot 1 3/4 inches). Girls' normal height can range from 1.5 m (4 foot 11 1/4 inches) at the 10th percentile to 1.67 m (5 foot 5 3/4 inches) at the 90th percentile. The average weight for girls at that age is 46.3 kg (102 lbs), with a range from 37.2 kg (82 lbs) at the 10th percentile to 62.1 kg (137 lbs) at the 90th percentile.
Average height and weight for boys
The average height for a 13-year-old boy is 1.57 m (5 foot 1 3/4 inches). Boys' normal height can range from 1.5 m (4 foot 11 inches) at the 10th percentile to 1.67 m (5 foot 5 3/4 inches) at the 90th percentile. The average weight for boys at that age is 46.3 kg (102 lbs), with a range from 36.3 kg (80 lbs) at the 10th percentile to 61.2 kg (135 lbs) at the 90th percentile.
- At age 13, most teenagers are well into puberty and may be in the middle of or about to embark on growth spurts.
- Boys' normal height can range from 1.5 m (4 foot 11 inches) at the 10th percentile to 1.67 m (5 foot 5 3/4 inches) at the 90th percentile.
Growth spurts
Boys reach their peak height velocity, or the height of their growth spurt, at 13.5 years, while girls reach it at 11.5. Growth spurts can last two to three years, with the average girl growing 8.7 cm (3.5 inches) per year and the average boy growing 11.2 cm (4.5 inches) during that time.