kaunajouna,
Yeah, I’ve never claimed that my calculator could provide scientific precision. It is, of course, just a quick way of calculating cylindrical volume. And as the penis is not a cylinder, it does however vary in girth - which is why I chose midshaft girth to be entered. Normally, for most guys, base is thicker and the bill of the glans tends to flare out wider than midshaft - usually. These discrepencies can hopefully make up for the narrower parts of the tapering glans and the area just below, which is usually thinner than midshaft.
I could make a calculator where you first entered your EL. Then you measured base girth, midshaft girth (with another specific length measurement), then girth just below the glans (with another specific length measurement), and a shaft measurement & glans measurement & girth, computing that with a conical formula, etc., etc., etc.
But what a pain in the ass! LOL. I just did this to make it quick & easy. Besides, any deviation from an exact measurement would be consistent throughout your PE career; i.e., I believe my simple calc is effective for tracking gains, which is what I’ve mostly designed it for.
The most accurate method I’ve heard so far is this… get a hollow cylinder (open at both ends). Calculate the cylindrical volume (preferrably with my metric version). Insert your unit into the tube with a strong BP, then fill the difference with water (make sure the tube is wide enough so that the water can freely travel all around your unit, not leaving any air pockets below the thickest point). Once you’ve “packed the tube,” carefully lean forward and pour the water into a measuring cup - all of it, of course! (if any is spilled, the reading will not be “precise”). You then subtract the captured fluid from the cylinder’s volume, which then leaves you will your own volumetric displacement.
If anyone does the above, do us a favor and compare the differences between that method & my calcs. I”m just curious how far off the simple cylinder forumla is….although, of course, that would naturally vary from one guy to the next. For some, the difference might be negligible; for others, significant.