How accurate is the Navy method?

The U.S. Navy tape method is a widely used estimate that's typically within a few percent of more expensive methods — great for tracking changes over time.

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Body Fat Calculator

Estimate your body fat percentage.

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How to use the Body Fat Calculator

1Choose your sex and units, then enter your height.
2Measure and enter your neck, waist (and hips for women).
3See your estimated body fat percentage and category.

About the Body Fat Calculator

Free body fat calculator — estimate your body fat percentage using the U.S. Navy method from a few tape measurements. Works for men and women in metric or imperial units.

Part of our Calculators collection. Browse all tools.

Frequently asked questions

How accurate is the Navy method?: The U.S. Navy tape method is a widely used estimate that's typically within a few percent of more expensive methods — great for tracking changes over time.