Body Fat Calculator
HealthEstimate body fat % (US Navy method).
Measure waist at the navel, neck below the larynx, and hip at the widest point for consistent results.
Body-fat percentage measures the proportion of fat versus lean mass in your body — a more informative health marker than weight alone. The US Navy method estimates it from circumference measurements: waist, neck, and (for women) hip, combined with height. It is reasonably accurate for tracking changes over time when you measure consistently. For clinical precision, methods like DEXA or calipers are more reliable, but the Navy method is a convenient at-home estimate.
How to use Body Fat Calculator
- 1Open the Body Fat Calculator calculator above.
- 2Enter your values into the input fields.
- 3Read the result shown instantly.
Formula
US Navy: BF = 86.01·log₁₀(waist−neck) − 70.04·log₁₀(height) + 36.76
Example
Male, waist 80, neck 38, height 175 → ≈ 15.6% (Fitness).
FAQs
What is Body Fat Calculator؟
Estimate body fat % (US Navy method).
Is Body Fat Calculator free to use?
Yes — it is 100% free, runs entirely in your browser, and needs no sign-up.
Does Body Fat Calculator work on mobile?
Yes, it is fully responsive and works on phones, tablets, and desktops.
