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Body fat (Navy)
Body fat
Tape measurements in, body-fat % out. No scale magic — circumference math.
Runs in your browser. Numbers stay on this device — nothing is uploaded to BrowserSpaces for processing.
Navy method
Height, waist, neck (+ hips for women).
Metric inputs
Centimeters.
Category hint
Rough fitness bands.
Use the calculator
Body fat %
22.7%
Rough category
Average
US Navy estimate with ACE-style bands — not a medical diagnosis.
How it works
How the Navy method works
Logarithms of circumference differences estimate density-related body fat %. Accuracy depends on consistent tape placement.
Before you start
- Morning measurements are more consistent.
- Not a substitute for DEXA or clinical assessment.
Three steps
- 1
Measure
Height, neck, waist (hips if female).
- 2
Enter cm
Use the same tape each time.
- 3
Read %
Estimate and category.