Originally Posted by
mucky
I still don't have the hang of this. I used John's calculator and it came out needing more fabric than I'd I did it the regular way.
Diagonal piecing is only efficient if your quilt is less than 50% wider than your backing. any more than that, and you are better off with straight piecing. So a 60" quilt, for 40" backing. In fact, I would say even less - I'd only go up to about 50" wide for diagonal piecing - those big triangles cut off feel wasteful to me, and I'd rather have long strips I can use for a future quilt.