US Navy Body-Fat Estimate
US Navy body-fat estimate (Hodgdon & Beckett 1984): a circumference-based body-fat percentage using neck, waist, and height (women add hip), with all measurements in inches.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Sex
- Male
- Height
- 70 in
- Neck
- 15 in
- Waist
- 34 in
Result: US Navy body fat 11.1% — circumference estimate.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- BF %
- Circumference estimate (inches): men use neck + waist, women add hip. Accurate to ~+/-3-4%. An estimate, not a measured composition or a diagnosis.
What you enter
- Sex
- Height
- Neck
- Waist
- Hip (women only)
How this is calculated
Hodgdon JA, Beckett MB. Prediction of percent body fat for U.S. Navy men and women from body circumferences and height. Naval Health Research Center; 1984. Reports 84-11 & 84-29. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.