1. What is Body Mass Index (BMI)?

Definition: BMI is a numerical value derived from an individual's weight and height that provides a simple indicator of body fatness.

Purpose: It's commonly used to classify underweight, normal weight, overweight, and obesity in adults.

2. How Does the BMI Calculator Work?

The calculator uses the formula:

Where:

• \( BMI \) — Body Mass Index (kg/m²)
• \( W \) — Weight (kilograms)
• \( H \) — Height (meters)

Explanation: The weight in kilograms is divided by the square of height in meters.

3. Importance of BMI Calculation

Details: BMI provides a quick assessment of weight status that helps identify potential health risks associated with being underweight or overweight.

4. Using the Calculator

Tips: Enter your weight in kilograms and height in meters. All values must be > 0.

5. BMI Categories

• Underweight: BMI < 18.5
• Normal weight: BMI 18.5-24.9
• Overweight: BMI 25-29.9
• Obesity: BMI ≥ 30

6. Frequently Asked Questions (FAQ)

Q1: Is BMI accurate for everyone?
A: BMI is a useful screening tool but doesn't directly measure body fat. It may not be accurate for athletes with high muscle mass or elderly people with muscle loss.

Q2: How do I convert pounds to kilograms?
A: Divide pounds by 2.205 (1 kg = 2.205 lbs).

Q3: How do I convert feet/inches to meters?
A: 1 foot = 0.3048 meters, 1 inch = 0.0254 meters.

Q4: Should children use this calculator?
A: No, children and teens need age- and sex-specific BMI percentiles.

Q5: What's a healthy BMI range?
A: For most adults, 18.5 to 24.9 is considered healthy.