1. What is BMI for Children?

BMI (Body Mass Index) for children is calculated the same way as for adults, but the results are interpreted differently. Children's BMI is compared to growth charts for children of the same age and sex to determine a percentile ranking.

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 NHS growth charts for children of the same age and gender to determine the percentile.

3. Importance of BMI Calculation

Details: Tracking BMI in children helps identify potential weight problems early. The NHS uses BMI percentiles to screen for underweight, healthy weight, overweight, and obesity in children.

4. Using the Calculator

Tips: Enter weight in kilograms, height in meters, and age in years (2-18). For accurate results, measurements should be taken with minimal clothing and no shoes.

5. Frequently Asked Questions (FAQ)

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

Q2: What are the NHS BMI categories for children?
A: Below 5th percentile (underweight), 5th-85th (healthy weight), 85th-95th (overweight), above 95th (obese).

Q3: How often should children's BMI be checked?
A: The NHS recommends annual checks as part of routine health assessments.

Q4: Are there limitations to BMI for children?
A: BMI doesn't distinguish between muscle and fat, so athletic children may have higher BMIs without excess fat.

Q5: What should I do if my child's BMI is concerning?
A: Consult with a GP or pediatrician for a full assessment and personalized advice.