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) - converted from centimeters

Explanation: The equation calculates body mass relative to height squared, providing a standardized measure of body composition.

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 centimeters. All values must be valid (weight > 0, height > 0).

5. Frequently Asked Questions (FAQ)

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

Q2: Is BMI different for women and men?
A: The same BMI values apply to both genders, but body composition differences mean women may have more body fat at the same BMI.

Q3: What are the limitations of BMI?
A: BMI doesn't distinguish between muscle and fat, so athletes may have high BMI without excess fat. It also doesn't account for fat distribution.

Q4: Is BMI accurate for all ethnic groups?
A: BMI thresholds may need adjustment for some ethnic groups who have different body compositions at the same BMI.

Q5: Should BMI be the only measure of healthy weight?
A: No, waist circumference and other measures should also be considered for a complete assessment.