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Body Fat Percentage Calculator

Estimate your body fat percentage with just a measuring tape, using the US Navy method.

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Body fat estimates are approximate and not a medical assessment. They are not suitable during pregnancy. Speak with a healthcare professional about your individual health. Medical disclaimer

What is a healthy body fat percentage for women?

Women naturally carry more body fat than men. For adult women, around 21–31% is commonly described as a fit to average range, while men are typically around 14–24%. Tape-measure estimates can be a few percent off, so they are best used to track your own changes over time rather than as an exact figure.

How this calculator works

  1. 1

    We use the US Navy circumference formula, which estimates body fat from your height and a few tape measurements.

  2. 2

    Women measure the neck, waist (at the navel) and hips; men measure the neck and waist.

  3. 3

    Results are grouped using widely used fitness ranges. Expect an error of a few percentage points.

Frequently asked questions

It is a reasonable estimate but can be off by a few percent compared with methods like DEXA scans. Measure at the same time of day, in the same way, and use it to track trends rather than a single reading.

It gives different information. BMI uses only height and weight, while body fat estimates how much of your weight is fat. Together with waist size, they give a fuller picture. None of them replaces a health check-up.

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