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Body Fat Calculator

Estimate body fat percentage from circumferences with explicit limitations.

Details below
About this tool

Practical estimate, not direct measurement.

Circumferences are accessible and useful for tracking, but they do not directly measure fat. Accuracy depends on technique, non-stretch tape and consistent anatomical landmarks.

How to use

Measure the same way every time.

  1. Enter height, neck, waist and, for the female formula, hip.
  2. Use a flexible tape without compressing the skin and repeat measurements.
  3. Compare trends carefully; do not use one number as diagnosis.
Anthropometry

Why technique changes the result

NCBI describes anthropometric measurements as noninvasive but subject to instrument, landmark and training error. Waist and hip have more variability than weight and height.

  • Measure waist at the same point.
  • Do not compress the skin.
  • Compare trends, not daily obsession.
FAQ

FAQ

No. DEXA and clinical methods assess composition more directly; tape is an estimate.

Health

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