Originally Posted by
Bluelady
This is the most popular website for looking at the outcome.
http://oneblockwonder.com/design-helper/
Note, to get an accurate outcome, you have to put in the actual dimensions of the photo so it can get an accurate reading of the size. It uses 3.75 as the size of the cuts, you can change that. It is a great tool!! And is as accurate as the dimensions you put in.
This is The most amazing helper when trying to decide which fabric to use! It only deals with 6 sided hexies though, so not as useful for the larger 8 piece triangles that you get when you cut a square but it is really useful. The best part of this app is that you can use your phone's browser to pull it up In Store before you purchase. Take a quick pic of the fabric, then upload that into the helper and Voila! You can easily decide if your fabric will work for you or if you need to find a different design.