I have stumbled upon this before and I found that if you have one of the blocks on that page, your OK. But the selection is limited and when I searched it went straight to Gooogle. I think this is why I gave up before.

WOW! Good find - thanks for sharing.

Love it - thank you. Have but it on my quick reference Google bar. Thanks.

Marysewfun

There is also a free quilting calculator available for iphones and androids from Robert Kaufman Fabrics. Sorry I don't know much about iphones, but I put this on my android tablet and it is a really cool tool. I think it's called "The Quilter's Little Helper". Betty

Been playing around on this site. Wanna say again what a great site this is!

Thank you, just bookmarked it

Very helpful site, thank you!