Body mass index (BMI) for boys, ages 2 to 20

Healthy and overweight ranges by age and BMI for boys age 2 to 20.

Adapted from U.S. Department of Health and Human Services (2000). Clinical Data on United States Children. Available online:

Use the chart to locate your child's BMI and age.

  • Children with a BMI in the white zone are considered underweight.
  • Children with a BMI in the green zone are considered to have a normal weight.
  • Children with a BMI in the yellow zone are considered at risk for being obese.
  • Children with a BMI in the red zone are considered obese.
  • A child who has a large upward change in BMI percentile, even if she is not considered overweight, should be evaluated to determine the cause.
  • A child who has continuously been in the 85th, 90th, or 95th percentile range is probably growing normally (homeostasis) for his body type.

Last Updated: March 17, 2008

Medical Review: Michael J. Sexton, MD - Pediatrics & Louis Pellegrino, MD - Developmental Pediatrics

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