The average weight of a 13-year-old varies by sex and individual development, but general estimates are as follows:
- For 13-year-old boys, the average weight is around 45 kg (100 pounds), with typical ranges from about 38 to 61 kg (84 to 135 pounds)
- For 13-year-old girls, the average weight is approximately 46 kg (101 pounds), with common ranges from about 34 to 67 kg (76 to 148 pounds)
These weights correspond roughly to the 50th percentile, meaning about half of children weigh less and half weigh more. Weight can vary widely due to factors like puberty timing, height, genetics, and overall health. For example, puberty can cause rapid changes in body composition and growth rates during this age
. In summary, the average weight for a 13-year-old is about 45–46 kg, but a healthy range is broad and depends on individual growth patterns.
