Child BMI Calculator

Calculate your child's BMI, growth percentile, and weight status with this pediatric weight calculator.

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About This Tool

The Child Weight Calculator helps parents and healthcare professionals assess a child's weight status by calculating Body Mass Index (BMI) and determining growth percentiles based on WHO standards. Simply enter the child's age, weight, height, and gender to get an accurate assessment of whether the child is underweight, normal weight, overweight, or obese. The tool provides detailed results including BMI value, percentile ranking, and actionable health recommendations.

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How to Use

Select the child's gender (male/female)
Enter the child's age in years (2-
Input weight in kilograms or pounds
Input height in centimeters or inches
Click 'Calculate' to see BMI, percentile, and weight status
Review the detailed results and recommendations

Frequently Asked Questions

Find Quick Answers

What age range does this calculator support?

This calculator is designed for children aged 2 to 18 years, using WHO growth standards for accurate percentile calculations.

How accurate is the BMI calculation for children?

The calculator uses standard pediatric BMI formulas adjusted for age and gender, providing results comparable to clinical assessments.

What do the percentile results mean?

Percentiles show how your child compares to others of the same age and gender. Below 5th percentile indicates underweight, 5th-85th is normal weight, 85th-95th is overweight, and above 95th is obese.

Can I use this calculator for infants under 2 years?

No, this calculator is specifically designed for children aged 2-18 years. Infants require different growth charts and calculations.

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