Navy Body Fat Percentage Calculator
Estimate your body fat percentage using the official U.S. Navy tape measure method.
The US Navy Method
The Department of Defense uses a specific tape-measurement method to estimate body fat percentage when military personnel do not meet standard height and weight tables. This method is highly regarded for its convenience and relative accuracy without needing expensive equipment like DEXA scans.
How to Measure Properly
- Neck: Measure just below the larynx (Adam's apple). Keep the tape level.
- Waist: For men, measure around the navel. For women, measure at the narrowest point of the waist.
- Hips (Women Only): Measure at the widest point of the buttocks.
Worked Example (Male)
- Height: 180 cm
- Waist: 90 cm
- Neck: 40 cm
- The complex logarithmic formula is applied.
- Estimated Body Fat: ~17.5%
Frequently Asked Questions
How accurate is this method?
The Navy method is generally accurate to within 3-4% of your true body fat percentage. It tends to overestimate body fat in individuals with narrow necks and underestimate it in those with thick necks.
Disclaimer: This calculator is for educational and informational purposes only. It is not a medical diagnosis or professional medical advice. The results provided should not be relied upon as a substitute for professional medical evaluation. Individual health needs vary greatly based on age, medical history, lifestyle, and other factors. Consult a qualified healthcare provider, doctor, or registered dietitian before making any health or medical decisions. If you are experiencing health concerns, seek immediate medical attention.