1. What is BMI?

BMI (Body Mass Index) is a measure that uses your height and weight to work out if your weight is healthy. The NHS Choices BMI calculation applies to most adults aged 18 and over.

2. How Does the Calculator Work?

The calculator uses the standard BMI formula:

Where:

• \( weight \) — Your weight in kilograms
• \( height \) — Your height in meters

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 a useful screening tool to identify potential weight problems in adults. However, it should not be used as a diagnostic tool as it doesn't directly measure body fat.

4. Using the Calculator

Tips:

• Measure your weight when you're naked or wearing minimal clothing
• Measure your height without shoes
• For most accurate results, measure in the morning before eating
• Enter weight in kilograms and height in meters

5. Frequently Asked Questions (FAQ)

Q1: What is a healthy BMI range?
A: For most adults, 18.5 to 24.9 is considered healthy. Below 18.5 is underweight, 25-29.9 is overweight, and 30+ is obese.

Q2: Does BMI apply to everyone?
A: BMI may not be suitable for athletes (who may have high muscle mass), pregnant women, children, and the elderly.

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

Q4: What are the limitations of BMI?
A: BMI doesn't distinguish between muscle and fat, so very muscular people may have a high BMI without excess fat.

Q5: Should I worry if my BMI is slightly outside the normal range?
A: A single slightly high or low BMI reading isn't necessarily cause for concern. Consult your GP if you're worried about your weight.