Navy Body Fat Calculator
Body fat percentage from tape measurements.
Enter your values
ⓘ Live results
Results
- Estimated body fat
- 16.4%
- Lean mass share
- 83.6%
Quick answer
The US Navy circumference method estimates body fat from a log-based formula using neck, waist and hip measurements.
Men: %BF = 495/(1.0324-0.19077log10(waist-neck)+0.15456log10(height))-450
How to use the Navy Body Fat Calculator
- 1Measure neck, waist, and for women, hips, in centimetres.
- 2Enter your height in the same units.
- 3This is an estimate with roughly 3-4% error versus DEXA — do not use it for medical decisions.
Worked example
Using the values the calculator loads with:
Inputs
- SexMale
- Neck38 cm
- Waist85 cm
- Hip (women only)95 cm
- Height178 cm
Results
- Estimated body fat16.4%
- Lean mass share83.6%
Frequently asked questions
How accurate is the tape method?
It's a convenient field method, accurate to within a few percent for most body types.
Where do I measure waist?
At the narrowest point, or at the navel if there is no natural narrowing.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.