1. What is BMI?

Body Mass Index (BMI) is a value derived from the mass 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 following formula:

For convenience, this calculator accepts weight in pounds (lbs) or kilograms (kg) and height in feet (ft), automatically converting them to the required units.

3. Importance of BMI Calculation

Details: BMI is a simple, inexpensive, and non-invasive surrogate measure of body fat. While it doesn't measure body fat directly, research has shown that BMI correlates to more direct measures of body fat.

4. Using the Calculator

Tips: Enter your weight in either kilograms or pounds, your height in feet. All values must be valid (weight > 0, height > 0).

5. Frequently Asked Questions (FAQ)

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

Q2: Is BMI different for women and men?
A: The same BMI ranges apply to both women and men, though women tend to have more body fat than men at the same BMI.

Q3: What are the limitations of BMI?
A: BMI doesn't account for muscle mass, bone density, overall body composition, or racial and sex differences.

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

Q5: Is BMI accurate for athletes?
A: BMI may overestimate body fat in athletes and others with muscular builds, as muscle weighs more than fat.