Free tool
Body Fat Calculator
The US Navy method — accurate body composition analysis using simple tape measurements.
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Full body fat calculator inside the app
Get your body fat %, fat mass vs lean mass, your category (essential/athlete/fitness/average), and how much to lose to reach your target zone.
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What you need to measure
Neck circumference (narrowest point), waist (at navel), and hips (widest point). A soft tape measure is all you need.
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Healthy ranges for women
Athlete: 14–20% · Fitness: 21–24% · Average: 25–31% · Obese: 32%+. Our calculator tells you your category instantly.