Penis Resources

Penile Volumetric DeviceMen have probably been measuring their penises for as long as measuring instruments have existed. There's just some sort of uncontrollable curiosity which compels us to discover the exact dimensions of our penis. While it's easy enough to determine penile length and width using a ruler or measuring tape, some believe that these methods are simply too imprecise. One man in particular, who comes into the spotlight in a rather unconventional manner, has come up with his own design which he feels will revolutionize the practice of penis measuring.

A Brief Background

Before we look at the actual invention, I'd like to take a moment to explain how I was first made aware of this information. As it turns out, one of our readers came across an article that he thought we would find interesting and forwarded us a link to the story. This article, published here on the Washington Post, tells of the inventor husband of a woman who stars on a television show called "The Real Housewives of D.C."

I have never watched the program and have little actual interest in the show itself but I must admit that I was intrigued by the topic of the article. Apparently the man mentioned in the above story, Jason Turner (husband of D.C. Housewife Stacie Turner) is the inventor of something called a "Penile Volumetric Measuring Device." I decided to do a little research to uncover more about this penis measuring invention.

Penile Volumetric Measuring Device

United States Patent 7,147,609
Filed: November 22, 2004
Inventor: Jason E. Turner / December 12, 2006

In a summary background of the invention Jason talks about the growing interest men have with the size of their penis and the need for a more accurate way of performing measurements. If you'd like to read the complete text it can be found on the patent page. I was more interested in the actual operation of the device itself.


"A volumetric measuring device for measuring a body part. The device includes a fluid container filled with fluid. The fluid container has a body part opening for permitting the insertion of a body part and a displaced fluid opening for permitting the flow of fluid that has been displaced as the result of inserting the body part. A watertight barrier covers the body part opening and maintains a watertight seal over the body part opening while the body part is being inserted. The volumetric measurement is determined by measuring the amount of displaced fluid after the insertion of the body part through the body part opening. In a preferred embodiment, the body part being measured is an erect penis."

There are 6 potential designs listed, or "Preferred Embodiments" as they are called on the patent page. Most of these are just variations on the components of 2 main designs. The primary difference between these two designs seems to be in how the penis actually fits into the device. The first calls for the penis to be inserted through the bottom of a container [See Fig. 1] while the second uses a side entry [See Fig. 12].

Both designs work on the very simple principle of fluid displacement. Basically you have a container of water that is marked with measurements to show the total amount of fluid contained in the vessel. When an erect penis is inserted into the container a certain amount of fluid is displaced (pushed out). Once the penis is removed, the level of water drops and you are able to correlate that amount of displaced liquid with the actual volume of the penis.

All of the images associated with this patent can be viewed by clicking the link located in the sidebar (see below Penis Measuring Device).

Penile Displacement Number (PDN)

Here's where it gets a little interesting. The volume of displaced fluid is generally measured in cubic centimeters (cc). So by that standard you would then be referring to the size of your penis in cc. For instance:

"A very well endowed human male having an erect penis having length 12 inches and diameter of 2.5 inches may have an erect penis that has a volume of approximately 964 cubic centimeters. In comparison, a more typical male may have an erect penis size of approximately 6 inches and diameter of 1.75 inches. This more typical male will then have an erect penis that has a volume of approximately 236 cubic centimeters."

Although this type of measurement may be scientifically precise, it can be a bit confusing for the average person. It's probably safe to say that most people would have no idea how big a penis actually was if it was described in cubic centimeters! To address this problem, the inventor has come up with his own measuring scale:

"Applicant has noted that it is potentially confusing to compare or categorize human male penis size if the scale being utilized is cubic centimeters. Therefore, Applicant has devised his own scale which he refers to as 'penile displacement number' or 'pdn'. Preferably, the scale is designed so that the average male has a pdn of 100. By designing the scale so that the average size penis is 100 pdn, it makes this preferred embodiment more appealing to the average user. Applicant believes that it is more of a positive reinforcement to the user to say that he has a '100 pdn' rather than saying that he has a '23 pdn' or a '24 pdn'. Hence, in one embodiment, assuming that the volumetric displacement of the average erect penis is 236 cc, a preferred conversion factor between penile displacement number and cubic centimeters is 1 pdn=2.36 cc. Using this conversion factor a well-endowed male porn star having a penis volume of 964 cubic centimeters would instead refer to his erect penis as having a pdn of 408.5. Or, he might say that his penis size is 408.5 pdn. In comparison, an average male having a penis volume of 236 cubic centimeters would instead refer to his erect penis as having a pdn of 100. Or, he might say that his penis size is 100 pdn."

So based on this new scale, an average male would refer to the size of his penis as 100 pdn instead of 236 cc. If his penis was above that size then it would give others an indication of how much larger than average his penis was. For instance a pdn of 110 is equivalent to a penis which is 10 percent bigger than average.

The Future of Penis Measuring?

The penile volumetric measuring device appears to be an incredibly precise instrument for gauging penis size. That being said, I'm not convinced that it will ever replace the much more simple method of penis measuring which employs rulers or tape. I'm not even sure why there's a need for such accurate measurements.

It's also a bit difficult to imagine men adopting a new measurement scale (pdn) in place of already easily recognizable measurements such as inches and centimeters. Perhaps health professionals might have a use for it.

I do applaud the inventor for coming up with this revolutionary penis measuring device. Mr. Turner is obviously a very intelligent individual and it will be interesting to see if there's a future for his invention.

Posted by PRS
Friday, August 27th, 2010


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