Hi Rhonda - Google quilt calculators and you will get a zillion hits. I have used web quilter for a simple quilt design and I just had a look at their calculator - which seemed accurate for the binding on a small baby quilt. Maybe check a few to see if you are getting consistent results and find one that you are comfortable using. That said - I like the figuring numbers part of quilting and I would be happy to help you with simple designs - curves, precuts, and non hst angles would be something I would definitely consider - but I am not as confident when I leave the simple part behind. I have noticed the many tutorials that you have generously shared - pm me if I can help.
Lefty - looking forward to the PNQE quilt show - in Philly