Body Fat Calculator

Estimate your body fat percentage with a tape measure.

Enter your height and your neck, waist measurements in centimetres.

Measurements

Calculated in your browser. Your numbers are not sent or saved.
Guide

How to estimate body fat

1

Measure yourself

Use a soft tape. Neck below the larynx, waist at the navel, and for women the hips at their widest.

2

Enter the numbers

Height, neck, waist and, for women, hip, in centimetres.

3

Read the estimate

See your body fat percentage and the group it falls in.

Frequently asked questions

How accurate is the US Navy method?

It is a practical estimate and can differ from a DEXA scan by several percentage points. It is best for tracking change over time with the same measuring method.

Where do I measure the waist?

Across the navel for men. For women, at the narrowest point of the waist. Breathe out normally and do not pull the tape tight.

What is a healthy body fat percentage?

It depends on age and sex. For men about 14 to 24% and for women about 21 to 31% are usual ranges. General guidance for adults, not medical advice.

Is my data saved?

No. Your measurements stay in your browser.

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