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Need help calculating quilt fabric yardage.
Harleyjo

Harleyjo
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IA USA
Member since 9/16/07
Posts: 113
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Date: 8/25/12 8:19 PM

I struggle so much with this. I am making a denim and flannel rag quilt. I have worked up my pattern and I am using denim I have on hand.

The quilt is going to be 56" x 56". I am having 7 blocks to each row width and height. These will be 8 " blocks. I need to have 12 blocks in 2 different colors and then I need another color that will be for the back side of the quilt and that will be 49 blocks total.

I thought I had it figured out but I am not sure now and in fact I am sure my initial thinking is wrong. Can you help please.

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Jolene

Harleyjo

Harleyjo
Intermediate
IA USA
Member since 9/16/07
Posts: 113
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Date: 8/25/12 8:29 PM

deleted can't get picture to show.
-- Edited on 8/25/12 8:37 PM --

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Jolene

Miss Fairchild
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Miss Fairchild
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In reply to Harleyjo <<


Date: 8/25/12 9:38 PM

So your question is...
A) How many blocks to make?
B) How much fabric to buy?

If it's no. B, add 1/2" to your 8" blocks and go from there. The rows will be 7 across by 7 down, meaning you need 49 blocks. In a strip that is 42" wide, as some quilting fabrics come 42" wide, and 9" long (which is a quarter yard), you will get four 8-1/2" blocks.

Take your 49 blocks and subtract 12 = 37. Round this number up to the next divisible number by 4 (because you're cutting 4 per strip) to get the number of strips you need to cut. The rounded number is 40. And 40 divided by 4 (blocks per strip) = 10 strips at 9" (I'm rounding them up to 9" because that is a quarter yard, and you might need the extra for straightening) 9" x 10 strips = 90" You need 90" (about 2-1/2 yards) of fabric for your 37 blocks.

As to the 12 blocks, being as you're cutting 4 blocks per strip, you need 3 strips at 9", which is 27" of fabric.

Edited: I draw my stuff out on graph paper because I can't do the numbers in my head. I have lots of graph paper around the house!


-- Edited on 8/25/12 9:40 PM --

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CM_Sews
CM_Sews
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Date: 8/25/12 9:56 PM

For a rag quilt, you'll want to add more than 1/2-inch for seam allowances. I'd add at least 1-inch (which gives you 1/2-inch "ragged" seams"). You'll want to cut 9-inch blocks to start, and sew with 1/2-inch seam allowance.

This doesn't substantially change the Miss Fairchild's advice. Cut 9-inch strips WOF, cut 9-inch blocks, you'll still get 4 blocks per strip (9x4=36).

CMC
-- Edited on 8/26/12 1:30 AM --

Harleyjo

Harleyjo
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IA USA
Member since 9/16/07
Posts: 113
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Date: 8/25/12 11:22 PM

Thank-you.

------
Jolene

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