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Body Fat Calculator

US Navy method using tape measurements.

Estimate body fat percentage from circumference measurements using the US Navy tape-measure method.

Priya Venkatesan By Priya Venkatesan
Reviewed by Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

cm
cm
cm
cm

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

Men: BF% = 86.010 · log₁₀(waist − neck) − 70.041 · log₁₀(height) + 36.76. Women: BF% = 163.205 · log₁₀(waist + hip − neck) − 97.684 · log₁₀(height) − 78.387.

In depth

Estimate body fat percentage from circumference measurements using the US Navy tape-measure method.

Frequently asked questions

Typically within 2–4 percentage points of DEXA for most adults. It's a screening estimate, not a clinical measurement.