Body Fat Calculator
Estimate your body fat percentage using the U.S. Navy circumference method.
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Body fat
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Category
How to use
- Choose metric or imperial units and your sex.
- Enter your height, neck, and waist (plus hip for women).
- See your estimated body fat percentage and category.
Frequently asked questions
How is body fat calculated here?
It uses the U.S. Navy circumference formula, which estimates body fat from body measurements. It is a quick estimate, typically within a few percent of a lab measurement.
Is it a substitute for a body scan?
No. Methods like DEXA scans are more precise. Treat this as a convenient estimate and consult a professional for anything important.
🔒 This tool runs entirely in your browser. Nothing you enter is uploaded, logged, or stored.
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