Child BMI Calculator
Calculate BMI for children and teenagers ages 2-20 with CDC-based percentile rankings. Includes weight status categories based on age and gender.
Enter weight, height, age (2-20), and gender to calculate child BMI.
Child BMI Percentiles
For children, BMI is interpreted using age- and sex-specific percentiles because body composition varies with age and gender. CDC growth charts are used for ages 2-20.
- Below 5th percentile: Underweight
- 5th to 84th percentile: Healthy Weight
- 85th to 94th percentile: Overweight
- 95th percentile and above: Obese
Disclaimer:This tool is provided “as is” for informational and educational purposes only. Results may not be 100% accurate. ToolBird makes no warranties, express or implied, regarding the accuracy, reliability, or completeness of any output generated by this tool. This tool does not constitute professional, legal, financial, medical, or tax advice. Always consult a qualified professional for important decisions. By using this tool, you agree that ToolBird and its operators shall not be held liable for any damages, losses, or consequences arising from the use of this tool or reliance on its results. All processing occurs in your browser — we do not store, transmit, or access your data. Use at your own risk.