Body fat calculator (Navy)

US Navy circumference method — height, neck, waist (and hip for women) → an estimated body-fat percentage.

US Navy circumference method — a population-level estimate. DEXA and bioimpedance devices can differ by several points.

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How to use

  1. Pick sex and enter height.
  2. Measure neck, waist, and (women) hip.
  3. Read the estimate and its category band.

What it supports

US Navy log-based formula: height 120–230 cm, measurements 20–300 cm; the female formula needs a hip value. A screening estimate (±3–4 %), not a measurement — tape placement changes it.

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