What is BMI percentile?

BMI percentile compares a child's BMI to other children of the same age and sex. A percentile of 50 means the child's BMI is higher than 50% of children their age and sex.

What percentile is healthy for children?

For children, percentiles between 5th and 84th are considered healthy weight. Below 5th is underweight, 85th-94th is overweight, and 95th or above is obese.

Are CDC charts universal?

CDC growth charts are based on US population data. While widely used, they may not be perfectly applicable to all populations. Consult healthcare providers for interpretation.

Why can't children use adult BMI?

Children's BMI changes significantly with age and growth. Adult BMI categories don't account for normal growth patterns, so percentiles based on age and sex are necessary.

⚖️ Child Kids Teen BMI Calculator

Child and teen BMI calculator using CDC percentiles. Enter age, sex, height, and weight to get BMI, percentile, and classification.

Age (2-20 years)

Sex

Height

Weight

Percentile Categories:

<5th: Underweight
5th-84th: Healthy weight
85th-94th: Overweight
≥95th: Obese

Note: This is an approximate calculation. For accurate pediatric BMI assessment, consult with healthcare providers.

Frequently Asked Questions

Common questions about child and teen BMI

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Last updated: 2025-10-21 — Compiled and reviewed by Calvin (Health Research, FreeCalculators.app)