Body Fat Calculator
Estimate your body fat percentage using the US Navy tape measure method. All you need is a measuring tape!
Measurements
cm
cm
cm
Body Fat
—%
Enter measurements
Body Fat Categories (Men)
Essential Fat
Athletes
Fitness
Average
Obese
2-6%
6-14%
14-18%
18-25%
25%+
Your Body Fat
%
How to Measure
- Waist: Measure at navel level, relaxed (don't suck in)
- Neck: Measure at the narrowest point, below the Adam's apple
Documentation
US Navy Method
The US Navy body fat formula was developed for military fitness assessments. It uses simple tape measurements to estimate body fat percentage with reasonable accuracy (±3-4% of DEXA scans).
Why This Method?
"No expensive equipment needed - just a tape measure and honest measurements."
The Formula
Men:
%BF = 86.010 × log₁₀(waist - neck) − 70.041 × log₁₀(height) + 36.76
Women:
%BF = 163.205 × log₁₀(waist + hip − neck) − 97.684 × log₁₀(height) − 78.387