I think the only way is to have a program such as Electric Quilt to draw up your ideas to the size you need, & it will tell you how much fabric. Check out Bonnie Hunters' blog and her free patterns. Her yardages for small piece quilts can amount up to 13-14 mts for a quilt around 78-80". I usually expect 12 yds for a Queen size, depending on how small the pieces will be.
https://quiltville.blogspot.com/p/free-patterns.html