1. What is Body Mass Index (BMI)?

BMI is a simple index of weight-for-height that is commonly used to classify underweight, normal weight, overweight and obesity in adults. It provides a rough estimate of body fat and health risks associated with weight.

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 is calculated by dividing weight in kilograms by the square of height in meters.

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 standard BMI categories?
A: Underweight (<18.5), Normal (18.5-24.9), Overweight (25-29.9), Obesity (≥30).

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

Q3: How often should I check my BMI?
A: Periodic checks (every 6-12 months) can help track changes, but it shouldn't be an obsessive daily measurement.

Q4: Are there better alternatives to BMI?
A: Waist circumference, body fat percentage, and waist-to-hip ratio provide additional information about health risks.

Q5: Should athletes worry about high BMI?
A: Athletes with high muscle mass may have high BMI without excess fat. Additional measurements are needed for accurate assessment.