This thread is cracking me up!
Since the human body is considered to be closet to a pig's body if working in a field that deals with decomp, I'm guessing rather than beef tallow, once rendered, we could plug the amount into soap calc under lard.
I am very curious now about human tallow and what sort of bar of soap it would make.... I'm sure if I look, some serial killer has already done this and I just haven't come across it yet, or they haven't bothered to pipe up about it. If I had to guess, it would be Ed Gein.
I'd say I would render into a couple of logs.
The Nazis did experiments making soap from human fat.
Not only did the Nazi do it, (which, not to sound completely morbid, considering the photos I have seen of the people they killed, I can't imagine there was any fat let in them and it must have taken a lot of them to make anything) but an artist did it in recent years with his own fat from lipo. Apparently, he showcased the soaps at an art exhibit with a sink and had people at the exhibit actually trying it.
http://www.huffingtonpost.com/2013/05/07/orestes-de-la-paz-soap-fat_n_3230944.html
http://orestesdelapaz.com/
Also, a few months ago, I saw this on an Avery label package. The name on the label in the picture on the package is Tyler Durden and the address is the address for the house where they made the soap and planned project Mayhem in the book (not the same address in the movie). I imagine the people who run Avery have no idea and it was kind of a joke by the person designing the package, like the adult things put into Disney movies.
When I looked for the link on Avery, they had changed the packaging, but some other sites still have the old packaging for sale, like this one:
http://www.bettymills.com/shop/prod...ntent=Office&gclid=CLisyY_38bsCFRNqfgod324Atg
I am a wealth of worthless knowledge.