Quilting math problem - need help!

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by , 12-14-2011 at 04:31 AM (818 Views)
When I see a pattern in a quilt magazine of perhaps a wall hanging and I like the pattern and would like to make a queen size (for example), how do I figure how to much more fabric to increase for the queen size quilt? Is there a formula? Also, I have seen calculators for quilters, would that show me how? Does anyone use one of those?
Example: Wall hanging:Size 52 x 52 Fabric requirements: red batik 7/8 yd; cream texture 1 1/8 yd, etc...
Queen Size: 80 1/2 x 80 1/2 for example...How do I figure how much red batik to buy for the queen size and how much for the cream texture material? I would really appreciate it if someone knows and can help me...I am poor in my math skills. Many thanks in advance.
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  1. janjer's Avatar
    my LQS will figure these changes for me if i take information to them and if i am purchasing fabric from them. i don't know how to use their calculators but they do.

    if i have to figure on my own this is kind of what i do:

    the 80 1/2 is 28 1/2 inches bigger than the wall hanging. (80 1/2 - 52= 28 1/2
    that is a little more that 1/2 the hanging size. so i figure i need enough additional fabric to make another half of the wall hanging
    so i would add another half to the amount called for in your pattern.
    example: red calls for 7/8 yd, so i would buy no less than 1 1/2 yard.
    that is 7/8 (round to 1 yard divide by 1/2 = 1/2 so 7/8 + 1/2 is 1 3/8 -----
    the cream calls for 1 1/8 (Round the 1/8 to 1/2) , half of that is 3/4 yard
    so i would purchase 1 1/8 + 3/4 = 1 7/8 yard (2 yards).
    i hope this makes sense.
    (i always round up to the nearest 1/2 yard when i buy)
    Updated 12-14-2011 at 09:09 AM by janjer
  2. Joycoy's Avatar
    Well, that makes good sense. Thank you so much! Merry Christmas and happy quilting.....

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