I'm usually working on two or three quilts at one time. So while I'm piecing on one, I'm quilting on another and maybe have a third that I'm about to sandwich, so this question always stumps me too. I don't keep a tally or watch the clock (or calendar! lol) for each quilt, so I never really know how to answer. I think I like the suggestion of "longer than you think" though! I might just borrow that one from now on. :-D :-D :-D