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  3. Body Fat Calculator (US Navy)

Body Fat Calculator (US Navy)

Estimate body fat percentage using the US Navy method.

🛡️ Runs Locally
Also try:Calorie Burn Calculator·Life Expectancy Calculator·Baby Development Tracker
How to measure›

Use a flexible tape measure. Stand upright, relaxed, and breathe normally.

  • Neck: measure just below the larynx (Adam’s apple) with the tape slightly downward at the front.
  • Waist (male): measure at the narrowest part of the abdomen.
  • Use the same unit for all measurements (cm or in).

Tips

  • Keep the tape snug but not tight; avoid compressing the skin.
  • Measure at a consistent time of day for better comparisons.

Body Fat Calculator FAQs

How accurate is the US Navy method?

The US Navy method is widely used and generally accurate within 3-4% for most people, but it's an estimation. DEXA scans are more precise.

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Premium feature

Historical analysis & trends

Track your past calculations and visualize patterns.

Calculation presets

Save, load, and manage your favorite calculation setups.

No presets saved yet.

Scenario planning

Compare multiple inputs side-by-side.

Batch processing

Upload a CSV to compute results in bulk.

Custom formulas

Create and reuse your own rules.

External data

Connect Google Sheets or an API as inputs.

By paying you agree to our Terms & Conditions • Privacy Policy • Shipping Policy • Cancellation & Refunds