Did you ever wonder how much thread it takes to quilt a quilt? I've discovered that as a general rule of thumb, 1000 m of thread will cover a Queen-sized quilt with a medium amount of quilting. If you are adding lots of dense quilting, you may need more like 1500 m. Let's use this scrap quilt (more pics here) from last year as an example. It's around 90" x 100", and had a lot of seams.
I used a new, large spool of Aurifil #2314, 50 weight, in both my needle and bobbin. These spools contain 1300 m of thread.
When I finished, I had this much left - maybe 150 meters.large spools of Aurifil really go a long way!