BMI Calculator
Calculate body mass index (BMI) using metric or US customary units and see the standard adult BMI category plus an estimated healthy-weight range for your height. The calculation runs entirely in your browser and is for general information, not medical diagnosis.
Calculate body mass index from metric or imperial height and weight inputs, then show the numeric BMI, the tool’s category, and a height-based reference weight range.
How to calculate BMI
- Choose metric or imperial units.
- Enter height and weight using the fields for the selected unit system.
- Calculate to view BMI, category, and the displayed reference weight range.
What the result means
BMI is a height-to-weight calculation used as a broad screening measure. This calculator applies its built-in category thresholds and derives a reference weight range from the same BMI framework.
BMI does not directly measure body fat, fitness, muscle mass, health status, or individual medical risk, and interpretation can differ by age, population, pregnancy, and clinical context.
Health information and privacy
Your values are calculated locally in the browser and are not uploaded by this tool. The result is general informational arithmetic, not a diagnosis or a substitute for individualized advice from a qualified health professional.
BMI Calculator FAQ
Can I use centimeters and kilograms?
Yes, in metric mode.
Can I use feet, inches, and pounds?
Yes, in imperial mode.
Is BMI a direct body-fat measurement?
No. It is calculated from height and weight.
Is the displayed range a personal medical target?
No. It is a reference derived from the calculator’s BMI framework.
Are my measurements uploaded?
No. Calculation is browser-local.