ToolGrid AIBody Fat (US Navy Method)
Estimate body fat percentage for men from waist, neck and height in cm.
Runs entirely in your browser — your selected files are not uploaded by this tool. Device-provided speech voices may use online services.
About this free body fat (us navy method) tool
Estimate body fat percentage for men from waist, neck and height in cm. Calculators answer a defined arithmetic question using the values you supply. Keep units and currencies consistent, choose the correct starting amount and inspect the assumptions before using a result. Estimates do not replace a lender quotation, an official tax rate, a medical assessment or a jurisdiction-specific deadline rule.
A practical example
A concrete example uses waist (cm): 85; neck (cm): 38; height (cm): 178. The result is Body fat (%): 16.436015.
Before you rely on the result
A general planning estimate, not medical advice. Individual needs vary; ask a qualified professional about your own situation.
Frequently asked questions
Is the body fat (us navy method) free to use?
Yes. The Body Fat (US Navy Method) is free, needs no account and has no usage limit beyond what your device can handle.
Are my files or numbers uploaded anywhere?
No. The Body Fat (US Navy Method) runs in your browser, so the values and files you enter stay on your device. Close the tab and nothing is kept.
What does the body fat (us navy method) do?
Estimate body fat percentage for men from waist, neck and height in cm. Calculators answer a defined arithmetic question using the values you supply. Keep units and currencies consistent, choose the correct starting amount and inspect the assumptions before using a result. Estimates do not replace a lender quotation, an official tax rate, a medical assessment or a jurisdiction-specific deadline rule.
When should I double-check the result?
A general planning estimate, not medical advice. Individual needs vary; ask a qualified professional about your own situation.
Can I share my result?
Yes. Use Copy result or Download, and on calculator-style tools use Copy share link to send someone a link that opens with the same inputs filled in.