Reviewed by Arisa Tanaphon, Certified Tai Chi Instructor, Mindful Movement Specialist
Key takeaways
- Pediatric BMI is used for screening in children and teens ages 2 to 19.
- For youth, BMI is interpreted by age- and sex-specific percentiles.
- Categories are underweight, healthy weight, overweight, and obesity.
- BMI is a screening tool and does not diagnose disease by itself.
What pediatric BMI means
For children and teens, BMI is interpreted differently from adults. Instead of fixed adult cutoffs, pediatric BMI is compared against CDC growth chart percentiles by age and sex.
That means the same BMI number can be interpreted differently depending on age and whether the child is male or female.
Who this is for
- parents and caregivers of children ages 2 to 19
- teens who want educational BMI guidance
- people who already have a BMI-for-age percentile and want category context
CDC Pediatric BMI Calculator
BMI screening for children and teens ages 2 to 19, with optional percentile-based category.
Pediatric BMI result
0
Sex: Female | Age: y m
Add BMI-for-age percentile to classify weight status using CDC pediatric categories.
Learn what to do nextFormula: BMI = weight(kg) / height(m)²
For ages 2 to 19 only. This tool supports screening and education, not diagnosis.
For medical interpretation, use official CDC growth chart methods and consult a pediatric clinician.
CDC percentile categories
- Underweight: less than the 5th percentile
- Healthy weight: 5th percentile to less than 85th percentile
- Overweight: 85th percentile to less than 95th percentile
- Obesity: equal to or greater than the 95th percentile
Limits of BMI screening
BMI screening does not directly measure body fat and does not diagnose a medical condition on its own.
Growth pattern, family history, nutrition, physical activity, sleep, and exam findings all matter when assessing pediatric health.
What to do next
- Use BMI results as a starting point, not a final diagnosis.
- Discuss concerns with a pediatrician, especially if percentile is high or changing rapidly.
- Focus on sustainable habits: sleep, meals, movement, and screen-time balance.
FAQ
References
Updated: 2026-04-15
