Body Fat Calculator
Estimate body fat percentage with the US Navy tape method.
Your details
How the body fat calculator works
Tape measurements around the neck, waist and hips predict body fat within a few percentage points for most people.
Formula
US Navy circumference method (log₁₀ of waist, neck, hip and height)
Worked example
A 178 cm man with a 86 cm waist and 38 cm neck is roughly 18% body fat.
Frequently asked questions
How accurate is the tape method?
Typically within 3–4 percentage points of a DEXA scan when measured consistently.
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