How does the Body Fat % (Navy Method) work?

Male: %BF = 86.010×log10(waist−neck) − 70.041×log10(height) + 36.76 Then: Female: %BF = 163.205×log10(waist+hip−neck) − 97.684×log10(height) − 78.387 Then: All measurements in inches for the original formula Then: Accuracy ±3–4% compared to DEXA (gold standard).

Can you give an example of how to use the Body Fat % (Navy Method)?

Example: Input Male: neck 38cm · waist 85cm · height 175cm gives a result of Body fat ≈ 17% (Healthy range for adult males: 10–22%).

Is the Body Fat % (Navy Method) free to use?

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

How accurate is the Body Fat % (Navy Method)?

Our Body Fat % (Navy Method) uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.

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Body Fat % (Navy Method)

💪Body Fat Calculator (US Navy Method)

Neck (cm)

Waist (cm)

Height (cm)

The US Navy body fat method estimates body fat percentage from circumference measurements (neck, waist, hip for women) and height, without requiring expensive body composition equipment. It was developed for military fitness standards.

Category	Male	Female
Essential fat	2–5%	10–13%
Athletic	6–13%	14–20%
Fitness	14–17%	21–24%
Average	18–25%	25–31%
Obese	> 25%	> 32%

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Did You Know?

The US military uses this method to set maximum body fat standards: males under 40 must be ≤ 20% (Army), ≤ 22% (Navy), ≤ 18% (Marines). Failure can result in discharge.

References

›Body fat percentage — Wikipedia

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Body Fat % (Navy Method)

💪Body Fat Calculator (US Navy Method)

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