Yes. A browser-based BMI calculator computes your body mass index instantly on the page, using the standard formula of weight in kilograms divided by height in meters squared, with imperial inputs supported too. There is nothing to install, no account, and your height and weight never leave your browser.
Free BMI calculator. Calculate your Body Mass Index in metric or imperial units and see your weight category instantly. Private, no sign-up.
Open BMI Calculator → Free toolFree BMI Prime calculator. See your BMI as a ratio to the upper healthy limit of 25, with category, computed instantly in your browser.
Open BMI Prime Calculator → Free toolFree body fat calculator using the US Navy method. Estimate body fat percentage from simple tape measurements of neck, waist and hips instantly.
Open Body Fat Percentage Calculator →BMI is weight in kilograms divided by height in meters squared. In imperial units the equivalent is 703 times weight in pounds divided by height in inches squared. The widely used adult reference ranges put 18.5 to 24.9 as the healthy band, with values below and above flagged for attention. It is a screening measure, not a diagnosis.
BMI needs two numbers and one division, so installing an app for it is overkill, and health measurements are exactly the data most people prefer not to hand to an app account. A client-side calculator loads as a page, computes locally, stores nothing, and works on any phone or desktop browser.
BMI does not separate muscle from fat, so muscular people can read high without excess fat, and it says nothing about fat distribution. Companion measures help: BMI Prime expresses your value relative to the top of the healthy band, and a body fat estimate from tape measurements adds composition context. For health decisions, talk to a professional rather than steering by any single number.
Weight in kilograms divided by height in meters squared, or 703 x pounds / inches squared in imperial units.
The commonly used adult reference band is 18.5 to 24.9. Ranges are screening guidance, not a diagnosis.
No. The calculation happens in your browser and nothing you enter is uploaded or saved.