1. What is BMI for Children?

Body Mass Index (BMI) is a measure of body fat based on height and weight that applies to children and teens. For children, BMI is age- and sex-specific and is often referred to as BMI-for-age.

2. How Does the Calculator Work?

The calculator uses the standard BMI formula adjusted for children's growth patterns:

The result is then compared to CDC growth charts to determine the percentile ranking:

• Below 5th percentile: Underweight
• 5th to 85th percentile: Healthy weight
• 85th to 95th percentile: Overweight
• Above 95th percentile: Obese

3. Importance of BMI Calculation

Details: Tracking BMI-for-age helps identify potential weight problems in children. Early identification allows for lifestyle changes to prevent health issues.

4. Using the Calculator

Tips: Enter weight in kilograms, height in meters, and exact age in years. For accurate results, measurements should be recent and precise.

5. Frequently Asked Questions (FAQ)

Q1: Why use percentiles for children instead of fixed BMI values?
A: Children's body composition changes as they grow, so percentiles account for normal growth patterns by age and sex.

Q2: What if my child's BMI is above the 85th percentile?
A: Consult a healthcare provider. They may assess diet, physical activity, family history, and other health measurements.

Q3: How often should my child's BMI be checked?
A: The American Academy of Pediatrics recommends BMI screening annually from age 2.

Q4: Are there limitations to BMI for children?
A: BMI doesn't distinguish between muscle and fat. Athletic children may have high BMI without excess fat.

Q5: What's the best way to improve my child's BMI percentile?
A: Focus on healthy habits - balanced diet, regular physical activity, and limited screen time rather than weight loss.