1. What is BMI?

Body Mass Index (BMI) is a simple calculation using a person's height and weight. The formula is BMI = [weight (lbs) × 703] / [height (inches)]². It provides a reliable indicator of body fatness for most people and is used to screen for weight categories that may lead to health problems.

2. How Does the Calculator Work?

The calculator uses the standard BMI formula:

Where:

• \( weight \) — Body weight in pounds (lbs)
• \( height \) — Height in inches
• \( 703 \) — Conversion factor (kg/m² to lbs/in²)

Explanation: The formula compares your weight to your height squared to determine if you're underweight, normal weight, overweight, or obese.

3. Importance of BMI Calculation

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

4. Using the Calculator

Tips: Enter your weight in pounds and height in inches. For accurate results, measure your height without shoes and weight with minimal clothing. All values must be valid (weight > 0, height > 0).

5. Frequently Asked Questions (FAQ)

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

Q2: Is BMI different for men and women?
A: The calculation is the same, but the interpretation may vary slightly as men typically have more muscle mass.

Q3: What are the limitations of BMI?
A: BMI may overestimate body fat in athletes and underestimate it in older people who have lost muscle mass.

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

Q5: Is BMI accurate for everyone?
A: BMI may not be accurate for very muscular individuals, pregnant women, or those with certain medical conditions.