1. What is BMI?

BMI (Body Mass Index) is a simple index of weight-for-height that is commonly used to classify underweight, normal weight, overweight and obesity in adults. It is calculated by dividing weight in kilograms by the square of height in meters.

2. How Does the Calculator Work?

The calculator uses the standard BMI formula:

Where:

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

Explanation: The formula provides a simple numeric measure of a person's thickness or thinness, allowing health professionals to discuss weight problems objectively with their patients.

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 that might indicate health risks.

4. Using the Calculator

Tips: Enter weight in kilograms and height in meters. For most accurate results, measure weight in minimal clothing and height without shoes.

5. Frequently Asked Questions (FAQ)

Q1: What are the BMI categories according to Australian guidelines?
A: Underweight (<18.5), Normal weight (18.5-24.9), Overweight (25-29.9), Obesity (≥30).

Q2: Are there limitations to BMI?
A: BMI doesn't distinguish between muscle and fat, so athletes may have high BMI without excess fat. It also may not be accurate for elderly, pregnant women, or certain ethnic groups.

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 lose or gain weight.

Q4: Should children use this calculator?
A: No, children and teens need age- and sex-specific BMI calculations as their bodies change rapidly during growth.

Q5: Where can I get more health advice about my BMI?
A: Consult your GP or a dietitian for personalized advice based on your BMI and other health factors.