1. What is Body Mass Index (BMI)?

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

Explanation: The formula calculates the ratio of weight to height squared, providing a standardized measure of body fatness.

3. Importance of BMI Calculation

Details: BMI is a quick screening tool for weight categories that may lead to health problems. It helps identify potential weight-related health risks and is widely used in clinical and public health settings.

4. Using the Calculator

Tips: Enter weight in kilograms and height in meters. All values must be valid (weight > 0, height > 0). For accurate results, measure weight and height precisely.

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), Obesity (≥30)

Q2: Is BMI accurate for everyone?
A: BMI may not accurately reflect body fatness in athletes (high muscle mass), elderly (loss of muscle mass), or certain ethnic groups.

Q3: Can BMI be used for children?
A: BMI calculation for children uses the same formula but is interpreted using age and sex-specific percentile charts.

Q4: What are the limitations of BMI?
A: BMI doesn't distinguish between muscle and fat mass, and doesn't account for fat distribution, which can affect health risks.

Q5: Should BMI be the only measure of health?
A: No, BMI should be used alongside other measurements like waist circumference, body composition analysis, and overall health assessment.