How is child BMI different from adult BMI?

Child BMI uses percentiles instead of fixed thresholds because children's body composition changes with age and gender. Growth charts with age- and gender-specific curves are used to assess weight status.

What is a BMI percentile?

BMI percentile shows how a child's BMI compares to others of the same age and gender. 5th-85th percentile is healthy weight, 85th-95th is overweight, and above 95th is obese.

What are the limitations of child BMI?

BMI cannot distinguish between muscle and fat — athletic children may be misclassified. Not suitable for children under 2. Always consult a pediatrician for complete assessment.

Child BMI Calculator - Growth Assessment

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Free online Child BMI Calculator based on WHO standards for ages 2-19. Enter age, gender, height, and weight for percentile assessment. 100% client-side.

Zero dependencies · Works offline

📋 Input Parameters

Gender

Age (2-19 years)

Height (cm)

Weight (kg)

📖 About Child BMI

Child BMI uses percentiles instead of fixed thresholds. Based on WHO growth standards: 5th-85th percentile is healthy, 85th-95th is overweight, >95th is obesity.

⚠️ BMI cannot distinguish muscle from fat. Not for children under 2. Results are for reference only — consult a pediatrician.

👶 Child BMI Calculator

📋 Input Parameters

📖 About Child BMI