1. What is BMI?

Body Mass Index (BMI) is a measure that uses height and weight to work out if a child's weight is healthy. 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 adapted for children:

The result is then compared to UK growth charts to determine the child's percentile.

3. Importance of BMI for Children

Details: Tracking BMI in children helps identify potential weight problems. Childhood obesity can lead to health problems later in life, while being underweight may indicate nutritional deficiencies.

4. Using the Calculator

Tips: Measure height without shoes and weight with minimal clothing. Use recent measurements as children grow quickly. For most accurate results, measurements should be taken at the same time of day.

5. Frequently Asked Questions (FAQ)

Q1: Is BMI accurate for all children?
A: BMI is a useful screening tool but doesn't directly measure body fat. It may be less accurate for very muscular children or those with certain medical conditions.

Q2: What is a healthy BMI for my child?
A: Healthy BMI ranges vary by age and sex. This calculator compares your child's BMI to standard growth charts.

Q3: My child's BMI is high/low - what should I do?
A: Consult your GP or health visitor for individual advice. BMI is just one indicator of health.

Q4: How often should I check my child's BMI?
A: For most children, checking every 6-12 months is sufficient unless advised otherwise by a health professional.

Q5: Where can I get more information?
A: The NHS website provides detailed growth charts and advice on child weight management.