What is the average weight for someone 12 years old and 5'3?

A good way to find out is to find your BMI. To do this: Multiply your weight in pound times 703 Then divide that number by your height in inches Then divide that number by your height in inches again. A BMI over about 25-30 is considered overweight, under about 18 is underweight. However, this does not measure muscle mass. So if you are very active it may be high but does not necessarily mean you are overweight