Understanding BMI for Children & Teens

BMI (Body Mass Index) is a screening tool that assesses weight relative to height. For children and teens, BMI is age- and sex-specific and is often referred to as BMI-for-age.

BMI Categories for Children

• Underweight: BMI below the 5th percentile
• Healthy weight: BMI between 5th and 85th percentiles
• Overweight: BMI between 85th and 95th percentiles
• Obese: BMI at or above the 95th percentile

CDC Growth Charts

The Centers for Disease Control and Prevention (CDC) growth charts are used to track growth patterns in children and teens in the United States. These charts show the distribution of body measurements (height, weight, and BMI) by age and gender.

This calculator uses CDC growth chart data to determine BMI percentiles. Always consult with a healthcare provider for a comprehensive assessment.