Body Fat Calculator (US Navy)
Estimate body fat percentage from height, neck, waist (and hip) measurements using the US Navy method.
Body fat
18.0%
- Fat mass
- 29.6 lb
- Lean mass
- 135.4 lb
Tape-measure estimates are typically within a few percentage points of lab methods.
Show the work
Height in inches
height = ft × 12 + in
5 × 12 + 9 = 69 in
US Navy equation for men (inches), to 1 decimal
BF = 86.010 × log10(waist − neck) − 70.041 × log10(height) + 36.76
86.010 × log10(34 − 15) − 70.041 × log10(69) + 36.76 = 18.0%
For general information only — not medical advice. Talk to a doctor or other qualified professional about your health.
How it works
Men: 86.010·log₁₀(waist − neck) − 70.041·log₁₀(height) + 36.76 · Women: 163.205·log₁₀(waist + hip − neck) − 97.684·log₁₀(height) − 78.387 (inches)
Questions
- How does the body fat calculator (US navy) work?
- Men: 86.010·log₁₀(waist − neck) − 70.041·log₁₀(height) + 36.76 · Women: 163.205·log₁₀(waist + hip − neck) − 97.684·log₁₀(height) − 78.387 (inches).
- What do I need to enter?
- Sex, Units, Height, Height (feet), Height (inches), Neck, Waist (at the navel), Hips, Weight. Optional fields can be left blank.
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