Last updated 23 August 2026
How the US Navy method works
Rather than pinching skinfolds with calipers, this method uses circumference measurements — waist, neck, and for women, hip — combined with height in a formula the US military validated against more precise methods. It's not as accurate as a DEXA scan, but it's within a few percentage points for most people, using only a tape measure.
Measuring correctly
- Neck — just below the larynx (Adam's apple), tape sloping slightly downward at the front.
- Waist — at the narrowest point, roughly navel height, without pulling the tape tight enough to compress the skin.
- Hip (women) — at the widest point around the hips and glutes.
Common questions
How accurate is the US Navy method?
It's within a few percentage points of more precise methods like DEXA scans for most people, which is why the US military still uses it for a fast, equipment-free estimate. It can be less accurate for people with very high muscle mass or unusual body proportions.
How do I measure my waist and neck correctly?
Measure the neck just below the larynx, and the waist at the narrowest point (roughly navel height) without pulling the tape tight enough to compress the skin. For women, the hip measurement is taken at the widest point.
Is this medical advice?
No. It's a general estimate from a standard formula, not a diagnosis. Body composition varies for reasons this calculator can't see, and a healthy body comes in many shapes — speak to a doctor for anything specific to your health.