1. What is Body Mass Index (BMI)?

Body Mass Index (BMI) is a measure that uses your height and weight to work out if your weight is healthy. The NHS BMI calculation is a simple way to assess whether you're a healthy weight for your height.

2. How Does the Calculator Work?

The calculator uses the NHS BMI formula:

Where:

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

Explanation: BMI provides a simple numeric measure of a person's thickness or thinness, allowing health professionals to discuss weight problems more objectively with their patients.

3. Importance of BMI Calculation

Details: BMI is widely used as a screening tool to identify potential weight problems in adults. However, it should be used as a starting point for further assessment as it doesn't directly measure body fat.

4. Using the Calculator

Tips: Enter your weight in kilograms and height in meters. For accurate results, measure your height without shoes and weight with minimal clothing.

5. Frequently Asked Questions (FAQ)

Q1: What are the NHS BMI categories?
A: Underweight (below 18.5), Normal weight (18.5-24.9), Overweight (25-29.9), Obese (30 and above).

Q2: Is BMI accurate for everyone?
A: BMI may not be accurate for athletes (muscle weighs more than fat), pregnant women, children, and the elderly.

Q3: How often should I check my BMI?
A: For most adults, checking every 3-6 months is sufficient unless you're actively trying to change your weight.

Q4: What if my BMI is outside the normal range?
A: Consult with a healthcare professional who can provide personalized advice based on your overall health.

Q5: Are there better alternatives to BMI?
A: Waist circumference, waist-to-hip ratio, and body fat percentage measurements can provide additional useful information.