1. What is Body Mass Index (BMI)?

Body Mass Index (BMI) is a simple index of weight-for-height that is commonly used to classify underweight, overweight and obesity in adults. It is defined as a person's weight in kilograms divided by the square of their 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 index by dividing weight by the square of height, providing a standardized measure of body composition.

3. Importance of BMI Calculation

Details: BMI is a simple, inexpensive screening method for weight category - underweight, healthy weight, overweight, and obesity. It helps identify potential weight problems that may lead to health issues.

4. Using the Calculator

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

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, Obesity: ≥30.

Q2: Is BMI accurate for everyone?
A: BMI may not accurately reflect body fat percentage in athletes (who have more muscle mass), the elderly, or those with unusual body compositions.

Q3: Should BMI be used alone to assess health risks?
A: No, BMI should be used as a screening tool alongside other assessments like waist circumference, diet, physical activity, and family history.

Q4: How often should I calculate my BMI?
A: For most adults, checking BMI every 6-12 months is sufficient unless you're actively trying to change your weight.

Q5: Is BMI applicable to children?
A: BMI is calculated differently for children and teens, taking into account age and sex percentiles rather than fixed categories.