Measuring Body Fat with a Tape Measure
The U.S. Navy circumference method estimates body fat percentage from a few tape measurements — no calipers or scans needed. Developed at the Naval Health Research Center, it remains the military's standard field assessment and is accurate to roughly ±3–4 % for most physiques.
How to Measure Correctly
- Neck: just below the larynx, tape sloping slightly downward at the front.
- Waist: men at the navel, women at the narrowest point — relaxed, after a normal exhale.
- Hips (women only): at the widest point of the buttocks.
Measure in the morning, unclothed, tape snug but not compressing skin. Take each measurement twice and average.
Healthy Body Fat Ranges
| Category | Men | Women |
|---|---|---|
| Essential fat | 2–5 % | 10–13 % |
| Athletic | 6–13 % | 14–20 % |
| Fit | 14–17 % | 21–24 % |
| Average | 18–24 % | 25–31 % |
| Obese | 25 %+ | 32 %+ |
Women naturally carry more essential fat than men — it supports hormone function and is not something to minimize.
For clinical accuracy, DEXA scans or hydrostatic weighing are the reference methods.