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Body Fat Calculator (US Navy)

Estimate body fat percentage using the US Navy circumference method.

About this calculator

The Body Fat Calculator (US Navy) on NumberCals is a free, mobile-friendly tool for anyone needing to estimate body fat percentage using the us navy circumference method. Enter your values in the form below and the result is computed instantly — no sign-up, no installation, no waiting.

Formula used

US Navy circumference method (cm)

What you'll need

  • Sex
  • Height (cm) (e.g. 175)
  • Neck (cm) (e.g. 38)
  • Waist (cm) (e.g. 85)
  • Hip (cm, women only) (e.g. 95)

What you'll get

  • Body Fat (%)
Formula
US Navy circumference method (cm)

Frequently Asked Questions

How accurate is the Navy method? +

Within ~3–4% of DEXA scans for most adults — much better than BMI for body composition, though not as accurate as a true scan.

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