1. What is BMI?

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

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 body mass relative to height squared, providing a standardized measure of body composition.

3. Importance of BMI Calculation

Details: BMI is a quick screening tool for weight categories that may lead to health problems. It's particularly important in eating disorder assessment and management.

4. Using the Calculator

Tips: Enter weight in kilograms, height in meters. For accuracy, measure weight in the morning after using the bathroom and before eating. Height should be measured without shoes.

5. Frequently Asked Questions (FAQ)

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

Q2: Are there different BMI ranges for different ages?
A: While BMI interpretation is generally the same for adults, children and adolescents use age- and sex-specific percentiles.

Q3: What are the limitations of BMI?
A: BMI doesn't distinguish between muscle and fat mass, and may not be accurate for athletes, pregnant women, or the elderly.

Q4: How does BMI relate to eating disorders?
A: BMI is often used as one indicator in eating disorder assessment, though clinical evaluation considers many other factors.

Q5: Are there Australian-specific BMI guidelines?
A: Australia generally uses the standard WHO BMI classifications, though some health organizations may provide additional guidance.