Body Fat Calculator (US Navy)

Use a flexible tape measure. Stand upright, relaxed, and breathe normally.

• Neck: measure just below the larynx (Adam’s apple) with the tape slightly downward at the front.
• Waist (male): measure at the narrowest part of the abdomen.
• Use the same unit for all measurements (cm or in).

Tips

• Keep the tape snug but not tight; avoid compressing the skin.
• Measure at a consistent time of day for better comparisons.