1. What is BMI for Children?

Body Mass Index (BMI) is a screening tool for overweight and obesity in children aged 2-19 years. For children, BMI is age- and sex-specific and is referred to as "BMI-for-age."

2. How Does the Calculator Work?

The calculator uses the standard BMI formula:

The result is then compared to CDC growth charts to determine the percentile based on the child's age and gender.

3. Importance of BMI Calculation

Details: BMI-for-age is the recommended screening measure for overweight and obesity in children and teens. It's a reliable indicator of body fatness for most children.

4. Using the Calculator

Tips: Enter weight in kilograms, height in meters, age in years (2-19), and select gender. For accurate results, measurements should be taken by a healthcare professional.

5. Frequently Asked Questions (FAQ)

Q1: Why is BMI interpreted differently for children than adults?
A: Children's body composition varies as they grow, and between boys and girls. BMI-for-age accounts for these differences.

Q2: What do the percentile ranges mean?
A: Underweight (<5th), Healthy weight (5th-<85th), Overweight (85th-<95th), Obese (≥95th percentile).

Q3: Is BMI accurate for all children?
A: BMI is a screening tool but not a diagnostic tool. Athletic children may have a high BMI due to muscle rather than fat.

Q4: How often should my child's BMI be checked?
A: The AAP recommends BMI screening at least annually at well-child visits.

Q5: What if my child's BMI is high?
A: Consult your pediatrician who may perform additional assessments like skinfold thickness measurements or diet evaluations.