Body Fat Calculator

Estimate body fat percentage from body measurements using the U.S. Navy circumference method with metric or imperial inputs.

Estimate Body Fat Percentage

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How Body Fat is Estimated

This calculator uses circumference measurements to estimate body fat percentage. It is useful for tracking progress, but it is still an estimate and can vary based on measurement accuracy.

  • Male formula uses height, neck, and waist.
  • Female formula uses height, neck, waist, and hip.
  • Measure at the same time of day for better consistency.