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 provides a useful population-level measure of overweight and obesity.

2. How Does the BMI Calculator Work?

The calculator uses the standard BMI formula:

Where:

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

Explanation: The formula calculates body mass per unit of height squared, providing a standardized measure that can be compared across different heights.

3. Importance of BMI Calculation

Details: BMI is a simple, inexpensive screening tool for weight categories that may lead to health problems. While it doesn't measure body fat directly, research has shown BMI correlates with more direct measures of body fat.

4. Using the Calculator

Tips: Enter weight in kilograms, height in meters, and age in years. For accurate results, measure height without shoes and weight with minimal clothing.

5. Frequently Asked Questions (FAQ)

Q1: Why does age matter in BMI calculation?
A: BMI interpretation changes with age. Older adults may have different healthy weight ranges compared to younger adults.

Q2: What are normal BMI values for men?
A: For adults under 65: 18.5-24.9 is normal. For 65+: 23-27.9 may be healthier.

Q3: Are there limitations to BMI?
A: BMI doesn't distinguish between muscle and fat. Very muscular individuals may have high BMI without excess fat.

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

Q5: Should athletes use BMI?
A: Athletes with high muscle mass may need additional measures like body fat percentage for accurate assessment.