1. What is BMI?

BMI (Body Mass Index) is a measure that uses your height and weight to determine 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
• \( height \) — Your height in meters

Explanation: The formula calculates your weight in relation to your height squared, providing a standardized measurement.

3. Importance of BMI Calculation

Details: BMI helps identify whether you're underweight, healthy weight, overweight, or obese. This can indicate potential health risks associated with being under or overweight.

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), 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. Other measurements may be needed.

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

Q4: What should I do if my BMI is outside the healthy range?
A: Consult with your GP or a healthcare professional for advice tailored to your individual circumstances.

Q5: Can children use this calculator?
A: No, children and teens need age- and sex-specific BMI calculations as their bodies change rapidly during growth.