Fitness · 🇨🇦 Canada · CAD
Body fat percentage calculator
Estimate your body fat percentage from a tape measure using the US Navy circumference method.
Body fat percentage
24.8%
- Category
- Average
- Fat mass
- 18.6 kg
- Lean mass
- 56.4 kg
Results are estimates based on your inputs. They are not financial, tax or medical advice.
How this calculator works
- 1Men: body fat % = 86.010 × log10(waist − neck) − 70.041 × log10(height) + 36.76.
- 2Women: body fat % = 163.205 × log10(waist + hip − neck) − 97.684 × log10(height) − 78.387.
- 3Measurements in centimetres; imperial inputs are converted automatically.
Tips from gym owners
- Measure the waist at the navel, relaxed, and the neck just below the larynx.
- Re-measure monthly under the same conditions and track the trend, not single readings.
Track this automatically with Tuckly
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Body fat calculator: FAQ
How accurate is the US Navy body fat method?
Within about 3–4% of DEXA for most people when measured carefully. It is excellent for tracking change over time.
What is a healthy body fat percentage?
Roughly 14–24% for men and 21–31% for women is typical "fitness to average"; athletes sit lower. Essential fat is about 3–5% for men and 10–13% for women.