1. What is BMI?

Body Mass Index (BMI) is a simple calculation using a person's height and weight. 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 standard BMI formulas:

Metric Formula: Weight in kilograms divided by height in meters squared

Imperial Formula: Weight in pounds multiplied by 703, divided by height in inches squared

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 BMI correlates with more direct measures of body fat.

4. Using the Calculator

Tips: Select your preferred measurement system (metric or imperial), enter your weight and height, then click Calculate. 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 normal weight. Below 18.5 is underweight, 25-29.9 is overweight, and 30+ is obese.

Q2: Is BMI accurate for everyone?
A: BMI may overestimate body fat in athletes and those with muscular builds, and underestimate it in older persons who have lost muscle mass.

Q3: Should children use this calculator?
A: No, children and teens need age- and sex-specific BMI calculations that account for growth patterns.

Q4: What are the limitations of BMI?
A: BMI doesn't distinguish between muscle and fat, doesn't account for fat distribution, and may not be accurate for certain ethnic groups or elderly.

Q5: What should I do if my BMI is high?
A: Consult a healthcare provider who can assess other factors like waist circumference, diet, and activity level.