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 simple 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)

3. Importance of BMI Calculation

Details: BMI helps identify weight categories that may lead to health problems. It's used to screen for weight categories that might indicate health risks, but it doesn't diagnose body fatness or health.

4. Using the Calculator

Tips: Enter your weight in kilograms and height in meters. For accuracy, 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), 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 (high muscle mass), pregnant women, or the elderly (muscle loss).

Q3: What's a healthy BMI range?
A: For most adults, 18.5 to 24.9 is considered healthy.

Q4: Should children use this calculator?
A: No, children and teens need age- and sex-specific BMI calculations.

Q5: What if my BMI is high?
A: Consult your GP who may consider other measurements like waist circumference.