Update on the Easy Pinwheels

Update on the Easy Pinwheels

If you haven’t seen the super easy pinwheel check it out –

But there are some questions that arise when you are doing more than the standard charm pack. So we went to our users and they came up with some great info to work with. Try the following –

Here is what have discovered…Cut your squares of fabric:

3 3/8” = 4” Block

4 1/2” = 5” block

5 1/8” = 6” block

5 7/8” = 7” block

6 5/8” = 8” block

7 2/8” = 9” block

8” = 10” block

8 5/8” = 11” block

9 3/8” = 12” block

Now here is the formula, it blew my mind but thank goodness for calculators!

Finished block size x 1.41 = finished diagonal

Divide the answer, the finished diagonal, by 2. Add 0.875″ and round up to the nearest 1/8″ to find your parent block size.

There, aren’t you glad I just gave you the measurements?

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Pretty cool eh’!! Just to be sure, I did make the 4”, 5”, 6” and 7” blocks with those measurements and they were spot on. I hope this helps you all! Let me know how it works for you.

  • Linda Horne

    The chart is great I need to add flying geese and corner squares the size have to match with this chart and a flying geese chart no math to work with

  • Cathy

    You need to change your chart formula instructions at the end. The last step should be to add 1 1/4″ to get a starting square size, not 7/8″. This will help a lot of people out!

  • Christiana Dean

    That is the addition size the block is when set on point. Ex a 10 in block set straight is 10 in, but turn the block on point to set it, it is now 10 in + 1.414 =11.414 in for block size.

  • Boisenoise

    I am terrible at math, so I was delighted to see the chart. However, it didn’t work out for me at all!!! I wanted 4″ finished pinwheel blocks for my current project. According to the chart, that means I should make my original squares 3 3/8.” I decided to cut them 3 1/2″, since that would be easier to measure and would give me some wiggle room for trimming them down afterwards to make sure they were nice and square. Then I used my 1/4″ sewing foot and put them together exactly according to the instructions in the video. When the pinwheels were sewn together, the blocks measured about 3 3/4″ . . . and that’s not the finished size, but the size they are before putting them into the quilt! I’ll need to figure out a way to add strips between them to make up the difference, but I really wish I knew what went wrong!

  • Boisenoise

    There is, and it’s fairly easy! However, it’s a bit hard to explain just with words. Let’s say that in the blocks you show, you have pressed every single pinwheel seam towards the brown. When you look at the “lump” on the back, you should be able to use your fingers to open that center part into a tiny pinwheel of its own. (This is easier to do if you have cut off the little dog-ears from the squares as you have put the blocks together.) You may have to coax a few stitches loose from the seam allowance there in the center (which won’t hurt anything, because it is the seam allowance).

  • Texaspup

    HooBoy! My Brain is feeling like a Pinwheel!