Body Fat Percentage Calculator
This calculator estimates your body fat percentage using the U.S. Navy method, which is based on easily obtained body measurements such as waist, neck, height, and hip (for women). It provides a more detailed picture of body composition than BMI.
What this calculator is doing
Body fat percentage (%BF) is the proportion of fat in your body compared to everything else (muscle, bone, water, etc.). This calculator uses the U.S. Navy formula, which is based on circumference measurements.
For males:
$$ \text{BFP} = 86.010 \cdot \log_{10}(\text{waist} - \text{neck}) - 70.041 \cdot \log_{10}(\text{height}) + 36.76 $$
For females:
$$ \text{BFP} = 163.205 \cdot \log_{10}(\text{waist} + \text{hip} - \text{neck}) - 97.684 \cdot \log_{10}(\text{height}) - 78.387 $$
Where:
- All lengths are in centimeters (cm)
- \( \log_{10} \) is the base-10 logarithm
These formulas provide a reasonably accurate estimate for most people. For athletes or clinical use, more advanced tools like DEXA scans may be preferred.
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