Health & Fitness calculator
Body Fat % Calculator
Estimate body fat percentage using the US Navy method.
How the calculation works
Male: 495 ÷ (1.032 − 0.191 × log10(waist−neck) + 0.154 × log10(height)) − 450. Female uses hip measurement.
Example: 80 kg, 180 cm, 90 cm waist, 38 cm neck male: ≈ 20%.
Important limitations
This tool provides a mathematical estimate based only on the values entered. It does not account for regulations, taxes, lender fees, medical circumstances, structural requirements, or other project-specific factors unless explicitly stated.
Frequently asked questions
How accurate is the body fat calculator?+
The calculation follows the displayed formula and retains full numeric precision before formatting the result.
Can I use the result professionally?+
Use it as a planning estimate. Confirm regulated, medical, financial, or construction decisions with a qualified professional.