How to use the Body Fat Calculator
- Choose gender and units
- Enter height, neck, waist (and hip) measurements
- See your body fat % and category
About this tool
Estimate body fat percentage with the U.S. Navy method using simple tape measurements. Body Fat Calculator is part of ToolNest's collection of free health & fitness. It works instantly in your browser with no account and no installation.
Frequently asked questions
Is the Body Fat Calculator free to use?
Yes. Body Fat Calculator on ToolNest is completely free, with no sign-up, no watermark and no daily limits.
How accurate is the Body Fat Calculator?
Body Fat Calculator uses standard, widely accepted formulas and calculates instantly as you type. Results are for general information — for important medical decisions, please confirm with a qualified professional or your institution.
Is my data saved anywhere?
No. Everything you enter stays in your browser. Nothing is sent to or stored on our servers.
Does Body Fat Calculator work on mobile phones?
Yes. ToolNest works in any modern browser on Android, iPhone, iPad, Windows, Mac and Linux. There is nothing to install.