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Thread: I know there is a formula for blocks Can not find it!

  1. #1
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    I would like to end up with a 9 inch block, in a pinwheel and a nine patch or even just a 4. I thought I had seen a formula, thought I marked it, but do you think I can find it, no. Spent last night looking. Thanks for pointing me in the right direction, appreciate it.

  2. #2
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    Graft the block on paper and cut and then add seam allowances.

  3. #3
    Super Member StitchinJoy's Avatar
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    Quote Originally Posted by judylg
    I would like to end up with a 9 inch block, in a pinwheel and a nine patch or even just a 4. I thought I had seen a formula, thought I marked it, but do you think I can find it, no. Spent last night looking. Thanks for pointing me in the right direction, appreciate it.
    Well, a pinwheel is based on a 4 patch, 2 across and 2 down. So you would need 4 HSTs to make it, and each HST would need to be 5" unfinished to finish at a 9" pinwheel. Here is a site with my favorite method for making the HSTs. http://www.kathkwilts.com/lessons/halfsqr.html

    A nine patch is 3 across and 3 down, so to make one that will finish at 9" block, you would need to cut 9 3.5" squares.

  4. #4
    Super Member hobo2000's Avatar
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    This is by far the easiest HST's.
    http://www.moonlightquilters.org/tipHSTfav.htm

    For more on HST do a search on the board/

  5. #5
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    Thanks for the information, the nine patch I figured out. And it is the same as your calculation. Now I have to think about the pinwheel. Hey, I have to say, I am just back from the dentist office had two teeth pulled, quilting kept my mind occupied, I figured the nine patch out while laying in the chair, were I there longer I might have given the pinwheel a go in my head. Who would have thought quilting would be good even sitting in the dentists chair. Something like calgon take me away....

  6. #6
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    Quote Originally Posted by StitchinJoy
    Quote Originally Posted by judylg
    I would like to end up with a 9 inch block, in a pinwheel and a nine patch or even just a 4. I thought I had seen a formula, thought I marked it, but do you think I can find it, no. Spent last night looking. Thanks for pointing me in the right direction, appreciate it.
    Well, a pinwheel is based on a 4 patch, 2 across and 2 down. So you would need 4 HSTs to make it, and each HST would need to be 5" unfinished to finish at a 9" pinwheel. Here is a site with my favorite method for making the HSTs. http://www.kathkwilts.com/lessons/halfsqr.html

    A nine patch is 3 across and 3 down, so to make one that will finish at 9" block, you would need to cut 9 3.5" squares.
    Thanks I have several of the 9 patch done, going to try the pinwheel, this is not going to take a large number since I am going around a panel. A way to use up my reserve here.

  7. #7
    Super Member StitchinJoy's Avatar
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    Is the panel some multiple of 9"? If not, you'll need to border the panel. I find they are often strange sizes, like 20" x 25" and need to be bordered before blocks can be added.

  8. #8
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    No it is not a multiple of 9, but I think if I cut off some of the side edge it might work, have the blocks done and was looking at it last night.

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