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# Thread: Help me do the math

1. How do I know what size to cut fabric without a pattern? For example, how can I figure the size of a four square patch if I want to put it next to a square (like a 6 inch or something)?

I hope this makes sense. You guys have helped me so so so much as I begin this wonderful quilting journey.

2. Since I am mathmatically challenged, I would make the 4 patch first, then cut my squares to match that size...

3. If you're putting it next to a 6 inch square (finished size), you divide 6 by 2 (because there are two squares for each 6 inch side) to get 3", then add the .5" for seam allowances. Cut the four patch units 3.5".

HTH!

4. You guys are smart! :) Thanks!

5. Originally Posted by CoriAmD
Since I am mathmatically challenged, I would make the 4 patch first, then cut my squares to match that size...
That's the idea! Make the most pieced blocks first then cut the alternate squares.

Cut your squares for 4-patch @ 3.5".......your alternate sq. will likely be cut in the 6.5" range.
OR
Cut your squares for 4-patch @ 4".......your alternate sq. will likely be cut in the 7.5" range.

Jan in VA

6. each seam is 1/4" -- so 6" divided by 2 for a 4 patch is 3" + 1/4" for 1 seam - so your small 4 patch squares would be 3 1/4" for a 6 in larger square

7. Always start with the size you want it to finish at (after all the seams are in the quilt).

So ... for a 6" finished 4P block ....
* each of the 4Ps would be 3"x3" finished
* add on 1/4" for seams on each side
* each of the 4Ps would be 3-1/2"x3-1/2"

You can do the same for 9Ps .... and most anything else! Keep this, and you're on your way to designing your own patterns, or looking at a photo and figuring it out!

8. I'm a math teacher ... and you all get an A+ !!

9. forget the math initially and draw what you want on graft paper and measure.

10. sounds reasonable

11. Originally Posted by QuiltE
Always start with the size you want it to finish at (after all the seams are in the quilt).

So ... for a 6" finished 4P block ....
* each of the 4Ps would be 3"x3" finished
* add on 1/4" for seams on each side
* each of the 4Ps would be 3-1/2"x3-1/2"

You can do the same for 9Ps .... and most anything else! Keep this, and you're on your way to designing your own patterns, or looking at a photo and figuring it out!
Just remember you need to add 1/2" for seam allowances to your solid squares as well to get to the same size!

12. Originally Posted by shnnn
Just remember you need to add 1/2" for seam allowances to your solid squares as well to get to the same size!
?? I thought I had explained that

13. Originally Posted by QuiltE
Originally Posted by shnnn
Just remember you need to add 1/2" for seam allowances to your solid squares as well to get to the same size!
?? I thought I had explained that
you explained the 4 patch in detail - but not the solid square - I tend to get so caught up in the details I miss the easy parts

14. Originally Posted by shnnn
Originally Posted by QuiltE
Originally Posted by shnnn
Just remember you need to add 1/2" for seam allowances to your solid squares as well to get to the same size!
?? I thought I had explained that
you explained the 4 patch in detail - but not the solid square - I tend to get so caught up in the details I miss the easy parts
I explained finished block .... etc.

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