US Navy Body Fat Calculator

Body Fat Categories

Category Men (%) Women (%)
Essential2–5%10–13%
Athletic6–13%14–20%
Fitness14–17%21–24%
Average18–24%25–31%
High25%+32%+
US Navy Measurement Guide

How This Calculator Works

This calculator estimates your body fat percentage using the U.S. Navy Method, which is based on circumference measurements and height. It is widely used due to its simplicity and reasonable accuracy for general fitness purposes.

Step 1: Take Measurements

  • Men: Neck, Waist, Height
  • Women: Neck, Waist, Hips, Height

Step 2: Apply the Formula

Men: Body Fat % = 86.010 × log10(waist − neck) − 70.041 × log10(height) + 36.76
Women: Body Fat % = 163.205 × log10(waist + hips − neck) − 97.684 × log10(height) − 78.387

Step 3: Interpretation

The resulting value represents an estimate of your body fat percentage. This can be used to classify your fitness level and track changes over time.

Disclaimer:
This U.S. Navy body fat calculator provides an estimate based on circumference measurements such as neck, waist, and hips (for women), along with height. Results may vary depending on measurement accuracy, body fat distribution, and individual differences in body composition. This method is not as precise as clinical assessments and should be used for general informational purposes only. It does not constitute medical, fitness, or nutritional advice.