Body Fat Percentage Calculator
Estimate body fat using the U.S. Navy method.
Measure with a soft tape, snug but not tight. This estimate is typically within a few percent of a body scan.
About the Body Fat Calculator
Free body fat calculator using the U.S. Navy circumference method. Estimate your body fat percentage from a few simple tape measurements.
Everything is calculated instantly in your browser — nothing you type is uploaded or stored. Bookmark Calcooly for the next time you need it.
How to use the Body Fat Calculator
- 1Choose your sex and measurement units.
- 2Enter your height, neck and waist (and hip for women).
- 3See your estimated body fat percentage and category.
Frequently asked questions
Which method is used?+
The U.S. Navy circumference method, which estimates body fat from a few simple tape measurements.
How accurate is it?+
It's usually within a few percent of a body scan. Measure snugly with a soft tape for the best result.
Is the result exact?+
It's a reliable estimate for general information. For important financial, medical or legal decisions, check with a qualified professional.