1. What is BMI?

Body Mass Index (BMI) is a simple calculation using a person's height and weight. The formula is BMI = kg/m² where kg is a person's weight in kilograms and m² is their height in meters squared. It provides a reliable indicator of body fatness for most people.

2. How Does the Calculator Work?

The calculator uses the standard BMI formula:

Where:

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

Explanation: The formula divides your weight in kilograms by your height in meters squared to give your BMI score.

3. Importance of BMI Calculation

Details: BMI is used to screen for weight categories that may lead to health problems. It's a simple, inexpensive method of screening for weight categories - underweight, healthy weight, overweight, and obesity.

4. Using the Calculator

Tips: Enter your weight in kilograms and height in meters. For most accurate results, measure weight in the morning before eating and height without shoes.

5. Frequently Asked Questions (FAQ)

Q1: What are the NHS BMI categories for adults?
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 overestimate body fat in athletes and those with muscular build, and underestimate it in older persons who have lost muscle mass.

Q3: How often should I check my BMI?
A: For most adults, checking BMI every 6-12 months is sufficient unless you're actively trying to lose or gain weight.

Q4: Does BMI differ for women and men?
A: The same BMI categories apply to both genders, though women naturally have more body fat than men at the same BMI.

Q5: What should I do if my BMI is too high?
A: Consult with a healthcare provider about healthy weight loss strategies including diet and exercise modifications.