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 BMI formula:

Where:

• \( weight \) — Body weight in kilograms (kg)
• \( height \) — Height in feet (ft)
• \( 0.3048 \) — Conversion factor from feet to meters

Explanation: The calculator first converts height from feet to meters, then calculates BMI by dividing weight by the square of height in meters.

3. Importance of BMI Calculation

Details: BMI provides a simple numeric measure of a person's thickness or thinness, allowing health professionals to discuss weight problems more objectively with their patients.

4. Using the Calculator

Tips: Enter weight in kilograms and height in feet. All values must be valid (weight > 0, height > 0).

5. Frequently Asked Questions (FAQ)

Q1: What are the standard BMI categories?
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 (high muscle mass) or elderly (loss of muscle mass).

Q3: Why use this calculator instead of others?
A: This calculator is specifically designed for females using metric weight (kg) and imperial height (feet).

Q4: How often should I check my BMI?
A: For most adults, checking BMI every few months is sufficient unless you're actively trying to change your weight.

Q5: What's a healthy BMI for women?
A: Generally 18.5-24.9, but optimal range may vary based on individual factors like age and ethnicity.