Body Fat Calculator
Estimate body fat percentage using circumference measurements.
Inputs
Body Fat Calculator
Results update as you type.
Live result
Body fat
10.1%
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Formula, examples, and FAQ stay tucked away until you need them.
FXFormula ExplanationThe core logic behind the numbers on this page.+
To use this calculator, you need to enter your waist, neck, and height measurements in centimeters. For the female estimate, you also need to enter your hip measurement. The calculator will then convert your measurements to inches and apply the US Navy equations to estimate your body fat percentage. Please note that this is an estimate and may differ from other measurement methods like DEXA or calipers.
USEHow to UseA short path from input to result.+
- Choose gender.
- Enter waist, neck, and height.
- Enter hip measurement for the female estimate.
EXExamplesReference scenarios to sanity-check your inputs.+
Example: A male with 86 cm waist, 39 cm neck, and 178 cm height estimates near 18% body fat.
FAQFAQCommon edge cases and quick clarifications.+
How does the Body Fat Calculator work?
The calculator applies the US Navy circumference equations to estimate body fat percentage based on your measurements.
What measurements do I need to enter?
You need to enter your waist, neck, and height measurements in centimeters. For the female estimate, you also need to enter your hip measurement.
How accurate is the Body Fat Calculator?
The calculator provides a convenient estimate, but the accuracy depends on the consistency and accuracy of your measurements, as well as your body type.
Can I use this calculator for other measurement methods?
No, this calculator is specifically designed for circumference measurements and uses the US Navy equations.
What is the difference between this calculator and other measurement methods?
This calculator uses circumference measurements, whereas other methods like DEXA or calipers use different methods to estimate body fat percentage.