1. What is BMI?

Body Mass Index (BMI) is a simple calculation using a person's height and weight. The formula is BMI = kg/m² where kg is a person's weight in kilograms and m² is their height in meters squared. It provides a reliable indicator of body fatness for most people.

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 equation divides weight by the square of height to account for the fact that weight increases with the square of height.

3. Importance of BMI Calculation

Details: BMI is a simple, inexpensive screening method for weight categories that may lead to health problems. For women over 60, maintaining a healthy BMI is particularly important for joint health, mobility, and reducing chronic disease risk.

4. Using the Calculator

Tips: Enter weight in kilograms and height in meters. For best results, measure weight in the morning after using the bathroom and before eating.

5. Frequently Asked Questions (FAQ)

Q1: Are BMI categories different for older adults?
A: Some research suggests the "normal" range might extend slightly higher (up to 27) for seniors, as very low BMI can indicate muscle loss.

Q2: What are the BMI categories?
A: Underweight (<18.5), Normal weight (18.5-24.9), Overweight (25-29.9), Obese (≥30).

Q3: What's a healthy BMI for Australian women over 60?
A: Generally 22-27, though individual health factors should be considered. Consult your doctor.

Q4: What are limitations of BMI?
A: Doesn't distinguish between muscle and fat, may underestimate obesity in older adults with muscle loss.

Q5: Should I use different measurements too?
A: Waist circumference (≤80cm for women) provides additional important information about health risks.