BMI Calculator
Calculate your Body Mass Index (BMI) using height and weight. See your BMI category and healthy weight range. Supports metric and imperial units.
How to Use BMI Calculator
- Select your preferred unit system (Metric or Imperial).
- Enter your weight in kilograms or pounds.
- Enter your height in centimeters (Metric) or feet and inches (Imperial).
- Your BMI, category, and healthy weight range are calculated instantly.
- View where you fall on the visual BMI scale bar.
Understanding Body Mass Index
Body Mass Index (BMI) is a simple and widely used method to estimate whether a person has a healthy body weight for their height. It was developed by Belgian mathematician Adolphe Quetelet in the 1830s and is used globally as an initial screening tool by healthcare professionals.
The metric formula is BMI = weight (kg) / height (m)², and the imperial formula is BMI = 703 x weight (lbs) / height (in)². This calculator also shows your healthy weight range based on a BMI of 18.5 to 24.9 for your specific height, so you can see the target weight range for a normal BMI classification.