Who this is for
People turning health targets into consistent daily habits.
Body Fat Calculator
Estimate your body fat percentage using the US Navy circumference method. See your category, body composition breakdown, and Fat-Free Mass Index (FFMI).
How we calculate this - methodology, formulas & sourcesBody Fat %
17.0%
Average
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kg
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cm
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Where you sit
Fat mass
14 kg
Lean mass
66 kg
Category
Average
Male: Essential 2–5% · Athletes 6–13% · Fitness 14–17% · Average 18–24% · Obese 25%+
Fat-Free Mass Index (FFMI)
FFMI
21.7
Adjusted FFMI
22.0
Above average
US Navy method (Hodgdon & Beckett, 1984): Uses circumference measurements to estimate body fat. Standard error of ±3–4% compared to DEXA scans. Less accurate at extremes (very lean or very high body fat). For clinical accuracy, consider a DEXA scan.