BMI Calculator
Calculate adult BMI with metric or imperial measurements, a visual reference scale and a private downloadable summary.
Private by design
Your inputs stay on your device and are not sent to our servers. Optional usage analytics does not receive your files or tool inputs.
How to use BMI Calculator
- Choose units, measurements or a session preset. Review the supported scope beside the controls.
- Adjust the plan and review the visual result. For a timer, select Start; Pause, Reset and Next remain available where applicable.
- Save a private summary, schedule or log if offered. Nothing is uploaded or automatically saved.
What are the limits of BMI Calculator?
CDC adult BMI categories for ages 20–100. BMI is not a direct body-fat measure or diagnosis; interpretation varies with muscle, age, pregnancy and population. Reference weight intervals are not a personal target. Not for children or pregnancy. Inputs and logs stay in page memory. No account, upload, health-data analytics, browser storage or medical-record synchronization. Leaving or refreshing the page can clear the session; explicitly downloaded files contain your information. Exports are local PNG/PDF summaries, CSV schedules or logs, and a sleep calendar where offered. These tools are for general planning and estimates, not diagnosis or individualized treatment.