5.5 Inch Penis: Average, Percentile & How Common Is It?
An erect length of 5.5 inches (about 13.97 cm) can be compared with the 2015 systematic review mean of 13.12 cm (5.16 inches), based on 692 erect-length measurements. A mean is a reference point, not a medical threshold; percentile estimates depend on the reference distribution and measurement method.
Is 5.5 inches considered big or average?
5.5 inches sits on the upper side of average. It is longer than about 67% of men, meaning only 1 in 3 men reach or exceed this size. It is noticeably larger than the true population average.
How common is a 5.5-inch penis?
Very common within the upper tier. About 15% of men fall between 5.3 and 5.7 inches. It is one of the most frequently recorded measurements in clinical studies.
5.5 inches in cm and partner perspective
5.5 inches (about 13.97 cm) is a unit conversion, not a percentile or diagnosis. For a consistent comparison, measure along the upper surface from the pubic bone to the tip and use the same method each time; bone-pressed and non-bone-pressed measurements are not directly interchangeable.
My Size Report provides a private, calculator-led way to understand measurements against published research. Results are informational and should not be treated as medical advice.