1. What is BMI for Children?

BMI (Body Mass Index) for children is calculated the same way as for adults, but the interpretation is different. For children, BMI is age and gender-specific and is compared to percentiles on growth charts.

2. How Does the Calculator Work?

The calculator uses the standard BMI formula:

Where:

• \( weight \) — Body weight in kilograms
• \( height \) — Height in meters

Explanation: The result should be compared to CDC growth charts to determine the child's BMI percentile for age and gender.

3. Importance of BMI Calculation

Details: BMI screening for children can identify potential weight problems, but it's not a diagnostic tool. Children with high BMI should be evaluated further by a healthcare provider.

4. Using the Calculator

Tips: Enter weight in kg, 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: What are the BMI categories for children?
A: Underweight (<5th percentile), Healthy weight (5th-85th), Overweight (85th-95th), Obese (≥95th).

Q2: Why use percentiles for children?
A: Children's body composition changes as they grow, so BMI must be evaluated relative to other children of the same age and gender.

Q3: When should BMI be measured in children?
A: The AAP recommends BMI screening annually from age 2, or more frequently if weight concerns exist.

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

Q5: What should I do if my child's BMI is high?
A: Consult a pediatrician who can perform further assessments and provide guidance on nutrition and activity.