BMI Calculator for Children and Teens

Body mass index (BMI) is one way to estimate a person's body fat. BMI is calculated using a person's weight and height. BMI is the most commonly used method to determine if an adult is overweight or obese. In children and teens, BMI is used to find out if a child is underweight, of a healthy weight, overweight, or obese. A child's body fat changes with age. Also, girls and boys differ in their amount of body fat as they mature. This is why BMI for children, also known as BMI-for-age, includes gender and age.

This calculator gives an approximate BMI for children from ages 5 to 18. It will tell you if a child is underweight, at an ideal weight, at risk of being overweight, or is now overweight.

Enter Child's Information

Gender:

Sources

Centers for Disease Control and Prevention CDC Tables

Centers for Disease Control and Prevention Growth Chart

Pietrobelli A., et al. "Body mass index as a measure of adiposity among children and adolescents: A validation study." Journal of Pediatrics. Vol. 132 no. 2. Feb. 1998.

Rosner, B. "Percentiles for body mass index in U. S. children 5 to 17 years of age." Journal of Pediatrics, Vol. 132 no. 2. Feb. 1998.

This calculator is not intended to replace the evaluation of a healthcare professional.

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