I'm new to fondant, I've never used it before. I'm making a 3 tiered wedding cake (6, 9, &12) as well as a grooms cake (12) and I'm not sure how many pounds of fondant I'll need. Can anyone help me out? I'm buying FondX in a 10lb bucket. Thank you!

The Satin Ice website has a chart at the bottom of the page:
http://satinfinefoods.com/product.htm

Thank you for the help, I went and looked at the chart. Now this might seem like a silly followup question, but do I need to double those measurements for each layer since I'm putting 2 cakes together (ie 2 12x3 layers sandwiched together for the bottom) or are they already set for a layered 12 inch cake?