Originally Posted by CindyinNY
Yes, thank you. I had my dh help me figure that out. I really would like to have a chart to refer to in the future though. Maybe it doesn't exist. lol
But every block is different. Suppose you were making a Churn Dash - the math on that is a bit different because the layout of the block is different (4x4).
The basic premise is you take your finished size block, break it down to your finished size components, and then add 1/2" to each of those measurements. Or do it in the reverse. That will work for squares.
Really, I've got to say though, that there are some basics that at some point you really just have to learn.
Here's a book by Joen Wolfrom
http://www.amazon.com/Make-Any-Block...0593740&sr=1-1
You can pick up a used copy for $6. Maybe that will offer you some sort of guidance.