I have a bud... well... it is a guy I had a lot of sex with in college... that is eight inches and 5 and a half inches in girth... I myself am almost 7 inches and about 6 and 1/4 inches in girth... we have been talking recently.... who is bigger??? I always felt like he had a much bigger penis... but I am now wondering...
I'm guessing you should take that college education of yours and put it to good use and figure this one out on your own.
Measured by volume, your dick is almost 1/3 larger. ***edit*** I figured your girth at 6.5 instead of 6.25. Don't worry, you're still about 26-27% or so (please don't me figure it out to the last decimal) larger than your friend.
you've got the circumference which is 2*pi*r your penile volume would be 1/2*pi*r²*length hope that helps
Take the penis' girth. Then, divide the girth by pi. Then, divide by two. Then, square the result. Then, multiply it by pi, times the penis' length. Do this for yourself. Then, do it for your buddy. Compare the answers.
A is pi-r-squared. R is C over 2-pi. V is A times H. H is penis length. C is penis circumf'rence. Pretty sure that's right.
Math teacher here. Friend: 19.26 cubic inches You: 21.76 cubic inches By sheer volume, you are bigger. FYI: Take your girth, divide it by pi, divide it by 2, square the result, and multiply it by pi. Then multiply that by your length.