CDC Pediatric BMI Percentile Calculator (0‑20 years)
Based on CDC 2000 Clinical Growth Charts | WHO Child Growth Standards (for children 0‑2).
Child's Information
CDC BMI Percentile Result
BMI
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Percentile
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Recent Calculations (click to restore)
CDC Pediatric BMI Percentile Categories
| Percentile Range | Category | Health Implications |
|---|---|---|
| <5th | Underweight | Possible undernutrition, growth delay, or medical issue. Pediatrician evaluation recommended. |
| 5th‑84th | Healthy weight | Optimal range for growth and development. Maintain balanced nutrition and physical activity. |
| 85th‑94th | Overweight | Increased risk of future obesity. Encourage healthy habits, not restrictive dieting. |
| ≥95th | Obese | High risk for type 2 diabetes, hypertension, and psychological issues. Clinical guidance advised. |
Based on the CDC 2000 Growth Charts. For children under 2 years, WHO standards are often preferred. This tool uses simplified key percentiles; official clinical assessment requires CDC software.
Understanding Percentiles
Your child's BMI percentile tells you how their BMI compares to other children of the same age and gender. For example, a 7‑year‑old boy at the 75th percentile has a BMI higher than 75% of boys his age. Percentiles are the standard way to assess pediatric growth because children change so rapidly.
Track trends, not single measurements. A single high or low reading could be due to measurement error or a growth spurt. The CDC recommends plotting BMI percentile at well‑child visits (every 6‑12 months).
If your child is in the underweight, overweight, or obese category, speak with your pediatrician. They can evaluate growth velocity, muscle mass, and rule out medical conditions.
Frequently Asked Questions
What is a normal BMI percentile for a 5‑year‑old?
5th‑84th percentile (healthy weight). A 5‑year‑old at the 70th percentile is normal – no action needed.
Can a muscular child have a high percentile but still be healthy?
Yes. BMI does not differentiate muscle from fat. A pediatrician can assess body composition and physical activity level.
How often should I calculate my child's BMI percentile?
Every 6‑12 months, or during well‑child visits. More frequent tracking is useful if monitoring a weight management plan.
Do Asian children use the same percentiles?
Yes, CDC charts are the international reference. However, some Asian populations may have elevated metabolic risk at lower percentiles – discuss with your provider.
What if my child's percentile changes suddenly?
Small fluctuations (±10 points) are normal. A sustained shift of >15 points in 6 months warrants a pediatrician visit.