Body Fat Calculator
Navy Method Analysis
Calculate body fat percentage using the U.S. Navy method
Measurements
Measure just below the Adam's apple
Measure at the navel
Enter Your Measurements
Fill in your measurements to calculate body fat percentage
Frequently Asked Questions
Get answers to common questions about body fat calculator
ℹ️ What is Body Fat Calculator?
A body fat calculator estimates your body fat percentage using measurements like height, weight, neck, waist, and hip circumference (using the US Navy method or BMI-based method). Body fat percentage is a more precise fitness and health indicator than BMI alone.
📐 Formula
✏️ Worked Example
- 1Waist − Neck = 85 − 38 = 47
- 2log₁₀(47) = 1.6721 | log₁₀(178) = 2.2504
- 3%BF = 86.010 × 1.6721 − 70.041 × 2.2504 + 36.76
- 4%BF = 143.82 − 157.57 + 36.76 ≈ 23.0%
💡 How to Interpret Results
- ▸Essential fat: 2–5% men, 10–13% women (minimum for physiological function).
- ▸Athletic: 6–13% men, 14–20% women.
- ▸Fitness: 14–17% men, 21–24% women.
- ▸Acceptable: 18–24% men, 25–31% women.
- ▸Above 25% men / 32% women — considered obese by body composition standards.
❓ Frequently Asked Questions
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