Body Fat % Calculator
US Navy circumference method — because BMI can't tell muscle from fat.
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How it works
US Navy (Hodgdon & Beckett, 1984). 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. The formula expects inches; your centimetres are converted first — mixing the two is the classic error.