Every pattern is different and requires different amounts, a queen sized quilt can take anywhere from 6 yards of fabric up to 20+ yards depending on the pattern, then you need another 9 maybe for backing, .... When someone asks me ( what do you charge to make a queen sized quilt?) My general response is - ' they start at about $500 and go up from there, what did you have in mind?' If they seriously are interested in getting a quilt they ask more questions, discuss what they were thinking of, or, they sniff & walk away. Without knowing what pattern, design, size a person wants it is not possible to give an estimate