1. What is BMI?

Body Mass Index (BMI) is a simple calculation using a person's height and weight. The formula is BMI = kg/m² where kg is a person's weight in kilograms and m² is their height in meters squared. It provides a reliable indicator of body fatness for most people.

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: The formula divides the weight by the square of the height to provide a standardized measure of body mass.

3. Importance of BMI Calculation

Details: BMI is a simple, inexpensive screening tool for weight category—underweight, healthy weight, overweight, and obesity. It can help identify potential weight problems in adults.

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 height without shoes and weight with minimal clothing.

5. Frequently Asked Questions (FAQ)

Q1: What is a healthy BMI range?
A: For adults, 18.5-24.9 is considered healthy. Below 18.5 is underweight, 25-29.9 is overweight, and 30+ is obese.

Q2: Are there limitations to BMI?
A: BMI doesn't directly measure body fat and doesn't account for muscle mass, bone density, or fat distribution.

Q3: Is BMI different for women and men?
A: The calculation is the same, but healthy ranges may vary slightly due to natural differences in body composition.

Q4: How often should I check my BMI?
A: Periodic checks (every 6-12 months) can help track changes, but don't overemphasize small fluctuations.

Q5: Should athletes use BMI?
A: Athletes with high muscle mass may have high BMI without excess fat, so additional measurements may be needed.