I'm wanting to practice making ganache and torte/cover a double layer 8 inch cake.  My question is, how do you calculated how much ganache you need to make to cover various cake sizes and shapes?  

Thanks

https://www.facebook.com/notes/royal-bakery/the-ganacherator/362938810394092

She links to a ganache calculator and walks you through it.

If you don't have FB,

http://dl.dropbox.com/u/28726919/The%20Ganacherator.xlsx

Thank you so much.  This is exactly what I need