1. What is BMI in Children?

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

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 is then compared to CDC growth charts to determine the child's percentile for their age and gender.

3. Importance of BMI Calculation in Kids

Details: BMI-for-age is the recommended indicator for screening overweight and obesity in children aged 2-20 years. Tracking growth patterns over time is more important than individual measurements.

4. Using the Calculator

Tips: Enter weight in kilograms, height in meters, age in years (2-20), and select gender. For accurate results, measurements should be taken with minimal clothing and no shoes.

5. Frequently Asked Questions (FAQ)

Q1: What do the percentiles mean?
A: Below 5th percentile = underweight; 5th to 85th = healthy weight; 85th to 95th = overweight; 95th and above = obese.

Q2: Why is BMI different for children than adults?
A: Children's body composition varies by age and gender as they grow, so their BMI must be compared to peers of same age and gender.

Q3: How often should my child's BMI be checked?
A: Yearly BMI screening is recommended for all children aged 2+ as part of routine health supervision visits.

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

Q5: What if my child's BMI is high?
A: Consult your pediatrician. They may assess diet, activity levels, family history, and possibly order additional tests.