1. What is BMI?

Body Mass Index (BMI) is a measure that uses your height and weight to work out if your weight is healthy. The NHS uses BMI as a screening tool to identify potential weight problems in adults.

2. How Does the Calculator Work?

The calculator uses the standard BMI formula:

Where:

• \( weight \) — Your weight in kilograms (kg)
• \( height \) — Your 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 important because it helps identify potential weight problems that may lead to health issues. 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 for adults?
A: Underweight (below 18.5), Healthy 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, or the elderly who may have lost muscle mass.

Q3: How often should I check my BMI?
A: For most adults, checking every few months is sufficient unless you're actively trying to lose or gain weight.

Q4: What should I do if my BMI is outside the healthy range?
A: Consult with your GP or a health professional who can assess your overall health and suggest appropriate lifestyle changes.

Q5: Does BMI differ for men and women?
A: The calculation is the same, but the interpretation may vary slightly as women naturally have more body fat than men.