Assuming the pre-surgery length was something normal (making it a rounding error from this point on) and the average 3.5" long flaccid penis takes 130 mL of blood to achieve a 5.17" erection (4.59" in circumference), those extra ~2.1 billion inches would require 5.4 million-ish liters of blood to fill. If those are 2.1 billion flaccid inches, call it about 8 million liters.
Average total blood volume for an adult human is 4.5 to 5.6 liters so we’re going to need more. An Olympic swimming pool is 50x25 meters with a minimum depth of 2 meters. That’s 2.5 million liters. It’ll take two of those full of blood and a little extra to get things up and running.
Somewhere in that ballpark anyway, I think. Don’t rely on this for medical purposes. Average dick-mensions and pool specifications from Wikipedia, blood fill numbers from a Healthline article.
zxqwas@lemmy.world 3 hours ago
That would make long distance relationships easier.
betterdeadthanreddit@lemmy.world 2 hours ago
And harder.