BMI Calculator for Kids
Calculate BMI for children aged 2–19 using CDC age-and-sex-specific growth charts with percentile classification.
Input Parameters
Enter details for calculation.
Child BMI
Expert Tip
For children, BMI is interpreted using age-and-sex-specific percentiles. A child at the 85th percentile is considered overweight; at the 95th, obese.
Calculation Methodology & Details
Formula
Unlike adults, children's BMI must be compared to age-sex reference values. Underweight: <5th percentile, Normal: 5th–84th, Overweight: 85th–94th, Obese: ≥95th.
Important Disclaimer
The calculations provided are for educational and general informational purposes only. They do not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider.
How Child BMI is Interpreted
Follow these steps to use this calculator:
Enter Age & Sex
Required for CDC percentile lookup.
Enter Weight & Height
Use accurate measurements.
Read BMI & Category
Classification is based on age-sex percentile.
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ℹ️ About this Calculation
This health calculator provides accurate anthropometric assessment and body composition metrics. Designed for clinical evaluation, fitness tracking, and physiological monitoring based on validated health guidelines.
Variable Glossary
Body Measurements
Height, weight, circumferences, or fold measurements recorded following standardized clinical protocols.
Anthropometric Indexes
Key physiological ratios and thresholds used to evaluate body fat distribution and medical classification.
How to Calculate Step-by-Step
Step 1
Enter your exact physical measurements into the designated fields.
Step 2
Select appropriate measurement units (Metric or Imperial) and demographic parameters if applicable.
Step 3
Review your computed index, category classification, and recommendations instantly.