1. What is BMI for Children and Teens?

BMI (Body Mass Index) is a screening tool for weight categories in children and teens aged 2-19 years. Unlike adults, BMI for children is age- and sex-specific and is plotted on growth charts to determine the corresponding BMI-for-age percentile.

2. How Does the Calculator Work?

The calculator uses the standard BMI formula:

Then compares the result to CDC growth charts to determine the percentile for the child's age and gender.

Explanation: The percentile shows how a child's BMI compares to other children of the same age and sex.

3. Importance of BMI Calculation

Details: Tracking BMI helps identify potential weight problems in children. High BMI can indicate overweight or obesity, while low BMI may indicate undernutrition.

4. Using the Calculator

Tips: Enter weight in kilograms, height in meters, and exact age in years. For accurate results, measurements should be taken with minimal clothing and no shoes.

5. Frequently Asked Questions (FAQ)

Q1: Why is BMI different for children than adults?
A: Children's body composition varies by age and sex as they grow, so BMI must be interpreted relative to other children of the same age and sex.

Q2: What are the BMI categories for children?
A: Underweight (<5th percentile), Healthy weight (5th to 85th), Overweight (85th to 95th), Obese (≥95th percentile).

Q3: When should I be concerned about my child's BMI?
A: Consult a healthcare provider if your child is below the 5th percentile or above the 85th percentile, or if there are sudden changes.

Q4: Are there limitations to BMI for children?
A: BMI doesn't distinguish between fat and muscle mass. Athletic children may have high BMI due to muscle rather than fat.

Q5: How often should BMI be checked in children?
A: The American Academy of Pediatrics recommends BMI screening annually from age 2.