NBPEL means Non-bone Pressed Erect Length. Here’s how NBPEL is measured:
See our separate BPEL guide
When it comes to accurate and consistent measurements, BPEL or Bone Pressed Erect Length is the most recommended procedure.
While NBPEL just measures the visible part of the penis, BPEL encourages measuring the “usable penis” by pushing through the fat pads under the pelvic skin until the ruler touches the bone.
Here is a list of studies for average penis length that used NBPEL as a method of taking a measurement.
Note that numbers 1 and 2 are objective medical studies where the measurements were performed by professionals. The figures in numbers 3 and 4 are self-reported data submitted by anonymous men.
Most studies state that the average penis length is between 5” to almost 6”.
There are studies that used NBPEL but they are considered inaccurate and unreliable. The thickness of fat pads vary from person to person, that is why NBPEL is rarely accepted.
Published studies do not usually specify the procedure for measuring the penis of the subjects, but flaccid stretched bone pressed is one of the most common methods used. This is because it may be hard for some subjects to have an erect penis while being examined in the doctor’s office. However, drug-induced erection has been performed in some studies.
The most trustworthy studies performed did not rely on self-reported measurements from the subjects, else they would have been at risk of collecting measurements done through NBPEL.
Nowadays, studies for the average penis length requires the subjects to go to the doctor’s office.