Body Fat Percentage Calculator
Estimate your body fat percentage using the US Navy method based on height, neck, waist, and hip measurements.
Published by:
isCalculator Editorial Team
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How to use this tool?
How to Use the Body Fat Percentage Calculator
- Select your gender – Choose Male or Female from the dropdown. For males, the hip input will be hidden.
- Enter your age – Must be between 18 and 100 years.
- Enter your height – In centimeters (cm), between 100 and 250.
- Enter your neck circumference – In cm, between 20 and 60.
- Enter your waist circumference – In cm, between 40 and 200.
- If female, enter your hip circumference – In cm, between 40 and 200.
- Click "Calculate Body Fat %" – The result shows your estimated body fat percentage, category (e.g., Athletes, Average), and the formula used (US Navy method).
Note: All measurements must be in centimeters (metric system). The calculator uses the US Navy circumference method and provides categories based on gender and body fat ranges.
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Frequently Asked Questions
The US Navy method is widely used and has an accuracy of about ±3% compared to hydrostatic weighing, provided measurements are taken correctly.
You need your height, neck circumference, waist circumference, and for females also hip circumference. Use a flexible tape measure and ensure consistent tension.
For men, 6-24% is generally acceptable; for women, 14-31%. Athletes often have lower percentages, while essential fat minimums are 2-5% for men and 10-13% for women.
