Estimate body fat percentage with the U.S. Navy method and review an ideal weight reference based on height.
Quick examples
The U.S. Navy method estimates percentage without weight, but weight lets this page show fat mass and lean mass.
Sex-specific range bar
Estimated body fat
9%
FitnessA lower fitness-oriented range.
Sex-specific range bar
Male
Estimated fat mass
6.7 kg
Estimated lean mass
67.3 kg
Waist / height ratio
0.48
Ideal weight reference
56.7 kg - 76.3 kg
Measurement guide
A tape that is too tight or too loose can move the estimate a lot.
Neck: measure comfortably below the Adam's apple.
Waist: use navel height or your narrowest waist line consistently.
Hip: used for the female formula; measure the widest part of the hips.
Body fat range guide
Ranges differ by sex. Athletes, older adults, pregnancy, and postpartum context may need different interpretation.
Very low
< 6%
A very low range. Review energy, recovery, and health context together.
Fitness
6 - 13.9%
A lower fitness-oriented range.
Average
14 - 24.9%
A common average reference range.
High
>= 25%
A higher range. Waist size and daily habits can add context.
This is an estimate from the U.S. Navy circumference method. It does not replace clinical, DEXA, or body composition testing.
Health use notice
This tool is for general reference only and does not replace medical, nutrition, diagnostic, or treatment advice. For health decisions, confirm the result with a clinician, registered specialist, or official guidance.
This tool uses circumference measurements with the U.S. Navy formula to estimate body fat percentage. Ideal weight is shown as a simple height-based reference.
It is a practical estimate based on body measurements, but it can differ from DEXA, InBody, or clinical testing.
No. Frame size, muscle mass, and training history can change what is ideal for an individual.
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