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: BMI is calculated by dividing weight in kilograms by the square of height in meters.

3. Importance of BMI Calculation

Details: BMI is a simple, inexpensive screening method for weight category—underweight, healthy weight, overweight, and obesity. For older adults with muscle mass, BMI should be interpreted with caution as it may overestimate body fat.

4. Using the Calculator

Tips: Enter weight in kilograms and height in meters. For men over 60 with significant muscle mass, BMI may not accurately reflect body fat percentage.

5. Frequently Asked Questions (FAQ)

Q1: Is BMI accurate for muscular older men?
A: BMI may overestimate body fat in muscular individuals as it doesn't distinguish between muscle and fat mass.

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

Q3: Should older men use different BMI ranges?
A: Some experts suggest a slightly higher range (23-27) may be more appropriate for those over 65.

Q4: What are alternatives to BMI for muscular individuals?
A: Waist circumference, body fat percentage measurements, or waist-to-hip ratio may be more accurate.

Q5: How often should BMI be checked?
A: For most adults, annual measurement is sufficient unless significant weight changes occur.