How do you measure your penis correctly, according to a urologist
Dr. Alexander Grant, MD, PhD: Urologist & Men's Health Advocate
Dec 09, 2025 · 14 min read
Urologists measure penis length as “bone-pressed” length. Press a rigid ruler into the pubic bone on the top side and measure straight to the tip (glans). Measure girth by wrapping a tape measure around the mid-shaft. With this standardized method, the average erect length is about 5.1 to 5.5 inches and the average erect girth ...