Health & Fitness · Free tool
Body Fat Calculator
Estimate body fat % using the U.S. Navy tape method — waist, neck, hip measurements. Free, private, mobile-friendly.
Body fat
23.5%
Category
Average
Men — body fat ranges
- Essential fat: 2–5%
- Athletes: 6–13%
- Fitness: 14–17%
- Average: 18–24%
- Obese: 25%+
Uses the US Navy circumference method. Estimates only.
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What it does
Estimate body fat percentage using the US Navy method — the easiest reliable calculation that only needs a tape measure. Enter sex, height, neck and waist circumference (and hip for women), and the tool returns your body fat % plus a category (essential, athletic, fit, average, or high) using ACE-published ranges.
Results are accurate to within a few percent for most people and much cheaper than a DEXA or BodPod scan. Measure in the morning, relaxed, and use the same tape position every time for good trend data. See BMI calculator for a simpler height/weight metric or ideal weight for target weight math.
How to use it
- Measure your neck, waist (and hip if female) with a flexible tape.
- Enter sex and height.
- Input each circumference in cm or inches.
- Read your body fat % and category.