Please clarified more how to calculate how much fabric you need to buy?
Please just calculate 44" fabric. Easier to figure out.
"This is the hard part. Figuring how much fabric you need. Now this depends on how many colors, how wide the fabric is, etc. Simply put, divide the width of your fabric by the block size with seam allowances included. Round this number down. This gives you the number of whole blocks you can get. Then divide the total number of blocks that you need by the number of blocks you can get from the width of your fabric. Round this number up and multiply it by your block size with seam allowances included.
For example: I will need 218-6" squares for a 45"x60" quilt. 108 for the front and 108 for the backing. If I am using a 45" wide fabric, then I can get 7.5 squares. However, I can only get 7 whole squares. 218/7=31.11111 or 32. 32x6"=192" or 5.333 yards."
9 x 12= 108
108 x 108 = 216? squares to cut
45"x60" = 9 sqs across 12 down
Fabric Finished size 5"
Cut out 6" fabric squares
1/2" seam allowance
Batting 5" squares
Thank you Bren
You're right so far.
Using 44" fabric = 44/6 (your starting square size) = 7.333
Since you can only get 7 whole squares from the width, you round down from 7.33 to 7. So, you can get 7 squares from the width of your fabric. You need 216 squares, so divide 216 by 7 = 30.87. This gets rounded up to 31 (this 31 number is the number of 6" rows you need to cut from the length). You now multiply 31 and 6 (your starting square size) to get the total length you need to buy = 186" or 5.16 yards.