Body Fat Estimate Calculator
Estimate body-fat percentage from tape measurements with metric or imperial units, measurement guidance and a private 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 Body Fat Estimate 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 Body Fat Estimate Calculator?
Historical Hodgdon–Beckett circumference equations use inches internally, with different male/female measurement sites. Tape technique can materially affect results. Not current military eligibility standards, a precise body-composition test, a diagnosis or an ideal-fat recommendation. Ages 20–100; not for pregnancy. Supported equation results: 2–70%. 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.