1. What is BMI?

Body Mass Index (BMI) is a value derived from the mass (weight) and height of a person. It provides a simple numeric measure of a person's thickness or thinness, allowing health professionals to discuss weight problems more objectively with their patients.

2. How Does the Calculator Work?

The calculator uses the standard BMI formula:

The calculator automatically converts all input units to the standard kg and meters before performing the calculation.

3. Importance of BMI Calculation

Details: BMI is widely used as a screening tool to identify possible weight problems in adults. While it doesn't measure body fat directly, research has shown that BMI correlates to direct measures of body fat.

4. Using the Calculator

Tips: Enter your weight and height in any of the available units. The calculator will automatically convert them to the standard units needed for BMI calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is a healthy BMI range?
A: For adults: Under 18.5 = Underweight, 18.5-24.9 = Normal, 25.0-29.9 = Overweight, 30.0 and above = Obese.

Q2: Are there limitations to BMI?
A: Yes. BMI doesn't account for muscle mass, bone density, overall body composition, or racial and sex differences.

Q3: Is BMI calculation different for children?
A: Yes. For children and teens, BMI is age- and sex-specific and is often referred to as BMI-for-age.

Q4: Why does the calculator convert everything to metric?
A: The standard BMI formula uses metric units (kg and m). The calculator handles all conversions automatically.

Q5: How accurate is BMI for athletes?
A: BMI may overestimate body fat in athletes and others who have a muscular build as muscle weighs more than fat.