Navy Body Fat Calculator
Estimate body fat with the historical Navy circumference equations, not current service eligibility.
Formula
Inches, log10: male=86.010×log(waist−neck)−70.041×log(height)+36.76; female=163.205×log(waist+hip−neck)−97.684×log(height)−78.387.
Height: 70 in · Abdomen / waist: 34 in · Neck: 15 in · Hip (female formula): 38 in · Equation sex = Female
How to use
- Measure height and neck.
- Male: abdomen at navel; female: narrow waist and widest hips.
- Read the adult estimate.
Examples
- Male: 70 in height, 34 in abdomen, 15 in neck → 17.5%.
Frequently asked questions
Which version?
Historical Hodgdon–Beckett Navy equations, reproduced by Foulis et al. (2023).
Does it determine Navy eligibility?
No. Current BCA policies differ. This is not a direct fat measurement.
Is this medical advice?
For reference only; it does not replace a clinician.
Sources
Updated: