Free BMI Calculator
Calculate your body mass index using U.S. or metric measurements and see the standard adult BMI category.
Calculate Your BMI
BMI is a screening measurement, not a diagnosis. Individual health varies.
What is BMI?
Body mass index is a height-to-weight calculation commonly used to screen adults for weight categories. It does not directly measure body fat, muscle mass, bone density, or overall health.
Healthy weight range
After calculating your BMI, this tool also estimates the weight range corresponding to a BMI of 18.5 through 24.9 for your entered height.
Who should use caution with BMI?
BMI may be less informative for highly muscular people, older adults with significant muscle loss, pregnant people, children, and people whose health conditions affect body composition. A healthcare professional can interpret the result in context.