1. What is Body Mass Index (BMI)?

Body Mass Index (BMI) is a simple index of weight-for-height that is commonly used to classify underweight, overweight and obesity in adults. It is defined as a person's weight in kilograms divided by the square of their height in meters (kg/m²).

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 calculates the ratio of weight to height squared, providing a standardized measure of body composition.

3. Importance of BMI Calculation

Details: BMI is widely used as a screening tool to identify potential weight problems in adults. It helps healthcare professionals assess health risks associated with underweight, overweight, and obesity.

4. Using the Calculator

Tips: Enter weight in kilograms and height in meters. Use accurate measurements for best results. All values must be valid (weight > 0, height > 0).

5. Frequently Asked Questions (FAQ)

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

Q2: Is BMI accurate for everyone?
A: BMI may not accurately reflect body fat in athletes, pregnant women, the elderly, or those with high muscle mass.

Q3: Why use metric units for BMI calculation?
A: Metric units (kg and m) are the standard for BMI calculation worldwide and provide the most accurate results.

Q4: How often should I check my BMI?
A: For general health monitoring, checking every 3-6 months is sufficient unless advised otherwise by a healthcare professional.

Q5: Should BMI be the only measure of health?
A: No, BMI should be used alongside other measurements like waist circumference, body composition analysis, and overall health assessment.