Body Fat Calculator
Estimate your body fat percentage using the U.S. Navy Method. A reliable tool for tracking fitness progress with body circumference tape measurements.
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U.S. Navy Method Formula
The U.S. Navy Method estimates body fat using circumference measurements. It is a reliable and accessible alternative to clinical methods.
The Formula
For Men: BF% = 495 / (1.0324 - 0.19077 × log10(Waist - Neck) + 0.15548 × log10(Height)) - 450. For Women: BF% = 495 / (1.29579 - 0.35004 × log10(Waist + Hip - Neck) + 0.22100 × log10(Height)) - 450. All measurements are in centimeters.
Fun Fact: The U.S. Navy uses this method because it's quick and only requires a tape measure—no special equipment needed! The method typically has a 3-4% margin of error.
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