Body Fat Calculator
Estimate body fat using common measurement methods.
Just below the larynx
At navel
Estimated body fat
15.7%
Fitness
Method
US Navy
Category
Fitness
Units
Metric (cm)
Tape-measure estimate (US Navy formula). Not a substitute for DEXA or clinical assessment.
In-depth explanation
Estimate body fat percentage with the US Navy tape-measure method using height, neck, waist, and (for women) hips. Everything runs locally in your browser — your inputs are not uploaded to produce the result.
The US Navy circumference formula — a tape-measure estimate, not DEXA or calipers. The female Navy formula includes hip circumference along with waist and neck.
It is a rough estimate. Hydration, posture, and measurement technique all affect the result. Use Body Fat Calculator for quick planning; confirm important money, tax, or health decisions with an official source or professional when needed.
The US Navy method uses circumferences. Measure neck and waist (and hips for women) the way the protocol describes or the result drifts. It is not DEXA, BodPod, or callipers.
Hydration, a full stomach, and tape placement move the percentage. Use it to track your own trend under the same conditions. Pair with BMI as a second crude index, then get clinical advice if you are making health decisions.
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Frequently asked questions
Which method is this?
The US Navy circumference formula — a tape-measure estimate, not DEXA or calipers.
Why do women need hip size?
The female Navy formula includes hip circumference along with waist and neck.
How accurate is it?
It is a rough estimate. Hydration, posture, and measurement technique all affect the result.
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