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Body Fat Percentage Calculator

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

Free to use Your entries and results stay in this browser. Lucaden does not upload them.

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How it works

Complete the job in three clear steps

  1. Enter adult sex, height, neck, waist, and where applicable hip measurements.
  2. Choose the relevant options and create an estimated body-fat percentage.
  3. Review the assumptions and download or copy the result when available.

Important

Check the result before relying on it

Review generated output before using it in production. Formatters and converters can validate structure, but they cannot understand every application-specific rule or guarantee that transformed content has the intended meaning.

Practical details

What this Lucaden tool does

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

This dedicated Lucaden route uses browser APIs and documented open-source foundations. It does not submit your working data to Lucaden.

Included capabilities

  • U.S. Navy circumference method
  • Metric and imperial units
  • Input plausibility checks
  • Method disclosure

Useful for

  • Track a rough measurement trend
  • Compare circumference inputs
  • Prepare a fitness discussion
  • Understand the Navy formula

Questions

About this tool

Is this a medical measurement?

No. Tape placement, hydration, body shape, age, and formula limitations can materially affect the estimate. Use validated clinical methods for diagnosis or treatment.

Where should measurements be taken?

Follow the measurement protocol used by the organization whose standard you need; this tool cannot verify tape placement or measurement technique.

Keep going

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Open-source foundations

Built transparently

Lucaden documents its standards sources, architectural references, and permissive runtime dependencies while keeping this workspace consistent with the Lucaden interface.

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