F*^k Aging!

Metabolic Health

Body Fat Estimator

US Navy circumference method (male formula) — three tape measurements, no calipers or scan needed.

Measure just below the larynx (Adam’s apple).

Measure at the navel, relaxed (not sucked in).

The Navy method is a circumference-based estimate, not a direct measurement (like DEXA or hydrostatic weighing) — expect it to be off by a few percentage points either way. Male formula only. For informational purposes only, not medical advice.