I can do the math if I know the equation but in this case I don't even know that there IS an equation other than trial and error! lol which I would REALLY like to avoid at this point.

So here is the question, what if any is the equation for making boarders. I know measure the quilt length first and add side boarders I know all that mess, but when you are putting strips together to make a boarder and you are doing the 45 degree seams how much extra do I need to add to the total length so I am not wasting a bunch of fabric? Does it depend on how wide your boarder is going to be? Should I add X inches for each seam needed to get the total length?

Maybe I am just making it way to complicated and I don't have to add anything other than the usual 1/4 inch to either piece for seam. lol It just seems like your cutting way more off when doing a 45 degree match up.