Health & fitness · NUMORA
Body Fat Calculator
Navy girth, or Deurenberg from BMI and age.
Open interactive calculatorHow to use
US Navy often ±3–4%. The BMI estimate is a population formula, not a scan.
Formula
Navy girth; or %BF=1.2BMI+0.23age−10.8sex−5.4
FAQ
Is this Body Fat calculator accurate?
The formula and assumptions are shown on the page, and the engine is covered by audit tests. Results are for reference — not financial or medical advice.
Do I need an account?
No. Calculations run in your browser. Recents can stay on this device.
What inputs do I need?
US Navy often ±3–4%. The BMI estimate is a population formula, not a scan.
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