100-130 pounds: The average weight for a 13 year old girl is 100 pounds on the CDC growth chart but weight varies with height and can range to 130 pounds which is the 75% on the growth chart. Have her primary care physician provide you with her body mass index (BMI) and where she falls on the growth curve for BMI to determine if she is underweight, overweight or normal weight for her age.
Answered 3/12/2015
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