All Tools VerseBody Fat Calculator - US Navy Method
Free body fat calculator using the US Navy tape method. Enter a few measurements to get your body fat percentage, category, and fat and lean mass. Print or share.
- Runs in your browser
- Nothing uploaded
- Free, no sign-up
Estimate your body fat percentage with the US Navy tape method, using a few simple measurements. See your category on a clear scale, plus your fat mass and lean mass. Everything runs in your browser.
How to Use Body Fat Calculator - US Navy Method
- Choose units and sex. Pick metric or imperial, and male or female. Women also enter a hip measurement.
- Measure with a tape. Measure your neck below the larynx, your waist at the navel, and for women the hip at the widest point. Keep the tape level and snug.
- Enter height and the measurements. Add your weight too if you want fat mass and lean mass.
- Read your result. See your body fat percentage, your category on the scale, and your fat and lean mass.
- Save it. Print a clean copy or copy a share link.
Frequently Asked Questions
What method does this use?
It uses the US Navy circumference method, which estimates body fat from neck, waist, height, and for women the hip. It is quick and needs only a tape measure.
How accurate is it?
It is a reasonable estimate for most people, usually within a few percent of more advanced methods. Measuring carefully and consistently gives the best results.
What are the categories?
Common ranges differ for men and women, covering essential fat, athletes, fitness, average and obese. The scale on screen highlights where your result falls for your sex.
How do I measure correctly?
Measure the neck just below the voice box, the waist at the navel, and the hip at its widest. Keep the tape horizontal and snug without squeezing, and measure on bare skin.
Is my information sent anywhere?
No. Everything runs in your browser. Your measurements never leave your computer and the tool works offline once loaded.
Is this medical advice?
No. It is for general guidance only. For a body composition assessment tailored to you, speak with a doctor or qualified professional.
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