Your body mass index (BMI) is a computation of your body composition, based on your weight and height. This is a useful tool to estimate your healthy body weight. Fill in the fields below and click on "Calculate" to get your BMI and your ideal weight. Our BMI calculator also asks you to indicate your age, bone structure, and sex for a more precise calculation.
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your height
ft.in.
your weight
lbs
age
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BMI Formula and Weight Categories
Our program will instantly calculate your BMI and your ideal weight.
The Body Mass Index (BMI) is calculated by dividing your weight (in pounds), multiplying it with a fixed number (703), and then dividing it by your height (in inches) squared.
BMI = [weight (lbs) x 703]) / [height (in) x height (in)].
For example, a person who is 115 lbs and measures 5 ft. in height has a BMI of: (115 x 703) / (60 x 60) = 22.46 BMI, which corresponds to a healthy weight.
Depending on your BMI, the program will categorize your current weight accordingly: