Body Fat Calculator — Estimates by Measurements
Estimate body fat percentage with the US Navy method
How to Use Body Fat Calculator
Estimate body fat percentage with the US Navy method No signup, and nothing gets uploaded for most use.
- 1
Enter your numbers in the input fields.
- 2
Choose the calculation options or frequency.
- 3
The result updates instantly as you type.
- 4
Review the breakdown, chart, or schedule, and copy the answer.
Why you might like it
- Nothing to upload — the work happens on your device.
- Free with no signup, no watermarks, and no daily limits.
- Works in any modern browser on any device — nothing to install.
- Usually done in a few seconds, so it doesn't get in your way.
Frequently Asked Questions
How accurate is the US Navy body fat formula?▾
Circumference-based estimates are reasonably accurate for most people (within a few percent) but less precise than DEXA or hydrostatic weighing.
Why is hip measurement only used for females?▾
The Navy equation for men only uses waist and neck because male fat distribution concentrates around the waist, while women also carry fat around the hips.
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