1. What is BMI?

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

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 formula calculates body mass per unit of height squared, providing a standardized measure for comparing individuals of different heights.

3. Importance of BMI Calculation

Details: BMI is a quick screening tool for potential weight problems in adults. While it doesn't measure body fat directly, research has shown that BMI correlates with more direct measures of body fat.

4. Using the Calculator

Tips: Enter weight in kilograms and height in meters. For accurate results, measure height without shoes and weight with minimal clothing. 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), Obese (≥30).

Q2: Does BMI differ between men and women?
A: The same BMI values apply to both genders, though body composition differs (women typically have more body fat at the same BMI).

Q3: What are the limitations of BMI?
A: BMI doesn't account for muscle mass, bone density, or fat distribution. Athletes may have high BMI due to muscle, not fat.

Q4: Is BMI accurate for everyone?
A: BMI may not be accurate for children, pregnant women, the elderly, or very muscular individuals.

Q5: What's a healthy BMI range?
A: For most adults, 18.5 to 24.9 is considered healthy, though optimal range may vary by ethnicity and other factors.