1. What is BMI?

Body Mass Index (BMI) is a simple calculation using a person's height and weight to assess body fatness. It's a screening tool that may indicate whether a person is underweight, normal weight, overweight, or obese.

2. How Does the Calculator Work?

The calculator uses the standard BMI formula:

Where:

• \( weight \) — Body weight in kilograms
• \( height \) — Height in meters

Explanation: BMI compares your weight to your height to estimate body fat. Higher values indicate higher 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.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

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

Q2: Is BMI accurate for everyone?
A: BMI may overestimate body fat in athletes and underestimate it in older people with lost muscle mass.

Q3: Why use metric units?
A: The standard BMI formula uses kg and meters. For pounds/inches: (weight/(height²)) × 703.

Q4: Is BMI different for women and men?
A: The same formula applies, but women typically have higher body fat at the same BMI.

Q5: What are the limitations of BMI?
A: Doesn't distinguish between muscle and fat, or account for fat distribution (e.g., abdominal fat).