Body fat, from a tape measure.
The US Navy circumference method estimates body fat from just a few measurements — no scale, no scan.
US Navy body-fat method
Body fat
17.0
%
Fitness
Essential
0–6.0
Athletic
6.0–14.0
Fitness
14.0–18.0
Average
18.0–25.0
Obese
25.0–50.0
Fat mass
12.8kg
Lean body mass
62.2kg
Good to know
How accurate is the Navy method?+
When measured carefully, the US Navy circumference method is accurate to roughly ±3% of DEXA scan values for most adults — the best you'll get without lab equipment.
Where do I measure?+
Neck: below the Adam's apple. Waist: at the navel for men, at the narrowest point for women. Hips (women only): at the widest point. Measure relaxed, tape snug but not compressing skin.
What's a healthy body fat?+
ACE categories: men 14–17% fitness, 18–24% average, 25%+ obese. Women 21–24% fitness, 25–31% average, 32%+ obese. Athletic ranges sit below those.
