1. What is BMI?

BMI (Body Mass Index) 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 (kg/m²).

2. How Does the Calculator Work?

The calculator uses the standard BMI formula:

Where:

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

Explanation: BMI provides a simple numeric measure of a person's thickness or thinness, allowing health professionals to discuss weight problems objectively with their patients.

3. Importance of BMI Calculation

Details: BMI is a simple, inexpensive screening method for weight category—underweight, normal weight, overweight, and obesity. While it doesn't measure body fat directly, research has shown that BMI correlates to direct measures of body fat.

4. Using the Calculator

Tips: Enter weight in kilograms and height in meters. For most adults, an ideal BMI is in the 18.5 to 24.9 range.

5. Frequently Asked Questions (FAQ)

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

Q2: Is BMI applicable to everyone?
A: BMI may not be accurate for athletes (who may have high muscle mass), pregnant women, the elderly, or children (special growth charts are used for children).

Q3: How often should I check my BMI?
A: For most adults, checking BMI annually is sufficient unless you're actively trying to lose or gain weight.

Q4: What are the limitations of BMI?
A: BMI doesn't distinguish between muscle and fat mass, and doesn't account for fat distribution, which is important for health risks.

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