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 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 simple, inexpensive screening tool for weight categories that may lead to health problems. It helps identify potential weight problems for adults, though it doesn't diagnose body fatness or health.

4. Using the Calculator

Tips: Enter weight in kilograms, height in meters, and select gender. All values must be valid (weight > 0, height > 0). The calculator will provide your BMI and weight category.

5. Frequently Asked Questions (FAQ)

Q1: What are the BMI categories?
A: Underweight (BMI < 18.5), Normal weight (18.5-24.9), Overweight (25-29.9), and Obese (≥30).

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

Q3: What are limitations of BMI?
A: BMI doesn't account for muscle mass, bone density, overall body composition, or racial/ethnic differences.

Q4: Is BMI accurate for athletes?
A: BMI may overestimate body fat in athletes with high muscle mass and underestimate it in older people with less muscle mass.

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