Body Fat % (US Navy)
BF% • fat mass • lean mass (quick field method)
Measurements
Keep tape snug, not tight
Units
Centimeters (cm)
Inches (in)
Sex
Male
Female
Height
Weight (optional, for lean/fat mass)
Neck
Waist
Hip (female only)
Hip used only for female formula.
Calculate
Copy summary
Measurement notes:
• Waist: around navel (exhale normally).
• Neck: just below Adam’s apple (level tape).
• Hip (female): widest point.
Results
BF% + composition
Body fat: —
This is an estimate; hydration and tape placement matter.
Lean mass: —
Lean mass = weight × (1 - BF%).
Fat mass: —
Fat mass = weight × BF%.
Validation
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