straighten Free · US Navy method
Body Fat Calculator
Estimate your body fat percentage from a few simple measurements — no scales, DEXA, or calipers required.
Enter your measurements
straighten
Enter your measurements to see your estimated body fat percentage.
Your body fat
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% body fat
Fat mass
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Lean mass
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Healthy range for you
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Body fat categories
Typical ranges defined by the American Council on Exercise (ACE).
male Men
Essential fat 2–5%
Athletes 6–13%
Fitness 14–17%
Average 18–24%
Obese 25%+
female Women
Essential fat 10–13%
Athletes 14–20%
Fitness 21–24%
Average 25–31%
Obese 32%+
info
This is an estimate. The US Navy method has a typical accuracy of ±3% vs. DEXA scans. Measure in the morning, relaxed, tape snug but not compressed. Track the trend, not a single number.
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