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, normal weight, overweight and obesity in adults. It provides a reliable indicator of body fatness for most people.

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: BMI is calculated by dividing a person's weight in kilograms by the square of their height in meters.

3. Importance of BMI Calculation

Details: BMI is a simple and widely used screening tool to identify potential weight problems in adults. It helps healthcare professionals assess health risks associated with underweight, overweight and obesity.

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, use precise measurements.

5. Frequently Asked Questions (FAQ)

Q1: What are the BMI categories for adults?
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 in athletes, elderly, pregnant women, or those with high muscle mass as it doesn't distinguish between muscle and fat.

Q3: How often should I check my BMI?
A: For general health monitoring, checking BMI every few months is sufficient unless you're actively trying to change your weight.

Q4: Can children use this calculator?
A: No, this calculator is for adults only. Children and teens require age and sex-specific BMI percentiles.

Q5: What's a healthy BMI range?
A: For most adults, a BMI between 18.5 and 24.9 is considered healthy and associated with the lowest health risks.