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I need some math help

I need some math help

Old 02-11-2012, 03:42 PM
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Default I need some math help

I am making a t-shirt quilt out of my old t-shirts. I am having a devil of a time with the math. I think I'm having a senior moment but it frustrating me to death. So here's the deal:

obviously various different sized blocks, need to finish to 15". So I take my block width measurement which is 7" subtract it from 15" which is 8, divide by 2 (for each side of block) and add back seam allowance of .50 (.25 for each side). But my measurements aren't working. So what am I missing.

TIA,

Bunny
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Old 02-11-2012, 03:51 PM
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what is not working? my thought---is the 7" (would need to be 7 1/2") if it only measures 7" then your finished size is 6 1/2" not 7...so you need to add 8 1/2" to get to 15 (+ seam allowance) so 9" = not 8 1/2"
i hope that helps.
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Old 02-11-2012, 04:23 PM
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Are you allowing for your seam allowance that will come off the 7 inch block? On your side pieces you will have to have a seam allowance on both sides of your side pieces also. I believe that you need a 4.5 piece, 7.5 t-square, and another 4.5 piece to equal your width of finished 15 inch block. If you cut your t-shirt blocks 7 inches it will finish at 6.5, so in that case your Pieces need to be 4.75 piece, 7 in block center, and another 4.75. I could be wrong, but this is the way I would figure it. Hope this helps.
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Old 02-12-2012, 08:08 AM
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Why do all the blocks have to be the same size. Look at some of the lovely Tshirt quilts where the sizes vary. They are very attractive.

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