The US Navy method estimates body fat percentage from a few simple tape-measure circumferences rather than requiring specialized equipment like calipers or a DEXA scan, making it a widely accessible approximation.
For men, it uses neck and waist measurements along with height; for women, it also factors in hip measurement, since fat distribution patterns differ between the two standard formulas.
Like any tape-measure method, accuracy depends heavily on consistent, correct measurement technique — measuring at the same body landmarks each time — and it remains an estimate rather than a clinically precise body composition analysis.
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Frequently asked questions
How accurate is the Navy method compared to a DEXA scan?
It's a reasonable field estimate but less precise than clinical methods like DEXA scanning or hydrostatic weighing, which directly measure body composition rather than estimating from external circumferences.
Where exactly should I measure my waist?
Typically at the navel level for the Navy method; precise landmark measurement matters more than most people expect for getting a consistent, comparable result over time.