Body Fat Percentage (Estimate)
Estimate body fat percentage using the US Navy circumference method.
Calculator
Try an example
How it works
This uses the US Navy formula (estimate only, not medical advice). Men: height, neck, waist. Women: height, neck, waist, hip. All measurements in centimeters.
Frequently asked questions
How do I use the Body Fat Percentage (Estimate)?
Enter the required values in the form. The result updates live as you type. You can adjust decimal precision, copy the answer, or share a link with your inputs pre-filled.
Can a percentage be greater than 100%?
Yes. Percentages above 100% mean the part is larger than the whole — for example, 150% of 80 is 120. Growth, markup, and error calculations often exceed 100%.
Why is my answer a decimal?
Many percentage calculations produce fractional results (for example, 15% of 250 is 37.5). Use the precision selector to control how many decimal places are shown.
Related calculators
Recent calculations
Stored only on this device.