Calculate body fat percentage using the US Navy tape method — with neck, waist and hip measurements and body fat category (Essential / Athletic / Fitness / Average).
Enter your figures and click Calculate to see your results.
Select gender, enter height, neck and waist in cm. Women also enter hip measurement. Take all measurements as described for accurate results.
Press the Calculate button. Results appear instantly using standard clinical and scientific formulas.
Results are displayed with all key values clearly labelled. Use the Copy button to grab your results or Download to save a text file. For health decisions, always consult a healthcare professional.
Yes — completely free with no sign-up required. All calculations run privately in your browser.
Results use standard clinical formulas. For health decisions, always consult a qualified healthcare professional.
Yes — fully responsive and works on all devices.
No — all calculations happen locally in your browser. Nothing is uploaded or stored.
Yes — use the Download button to save a text summary of your results.
