Question: how to figure how much fabric for a quilt?
Answer: The 60 triangles divided by the two each square yields means 30 squares are required. Most quilting fabric has a usable width of about 40 inches, often a bit more. Divide 40 inches by 3-7/8 inches, the size of your squares. The answer, 10.32, is the number of 3-7/8 inch cuts you can make across the width of the fabric.