Navy Body Fat
Circumference estimate used by the US Navy method.
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Tape measurements plug into the US Navy circumference equations. Error versus DEXA can be several points. This is an estimate.
How to use this tool
- Enter your measurements. Use the units shown on the labels. Do not send medical data anywhere.
- Read the estimate. These formulas are public rules of thumb, not a diagnosis.
- Talk to a clinician for decisions. Do not change medicine, diet, or training from this page alone.
How to measure
Tape level, snug, not compressing skin. Waist is typically at the navel for this method. Inconsistent landmarks wreck the estimate.
Frequently asked
Is this the same as a caliper test?
No. Different method, different error pattern.
Why is there a sex field?
The published equations differ. They are population fits, not identity rules.
Can athletes trust this?
Often poorly. Muscle necks and waists confuse circumference models.
Is a tape percent the same as a clinic DEXA?
No. Navy equations are a circumference estimate, not medical advice.
Does the page store measurements?
No. They stay in this tab.