I have both copies of Trianglations software; the second one does the 1/8 measurements and so much more. Bottom line; yes, so worth it. I go to the Dollar Store and get the kids drawing paper and cut it down to size and use it to print them out on. You save so much money, it has the all of the info on finished sizes and unfinished sizes. It is so easy and saves so much time especially if you have lots of them to do. You don't have to worry about the store having the correct size of paper in that you want either.