Bmi For Teenager. Select your child's gender (male or female). There is one more item in the bmi calculator for teens that we haven’t mentioned yet, bmi prime.this quantity, derived from bmi, is a measurement of how close your bmi is to the.

You can easily calculate your bmi with the following formula: A bmi of less than 18.5 indicates the teenager is underweight, while a bmi between 18.5 and 24.9 indicates that. If you’re a child or teenager with a bmi percentile over 85%, you are at risk for: