In response to Prudence's facetious comment about "how-tos", I decided to start with this handy on-point reference chart. So there, Prudence! ;)

On-point reference chart

If you are using an on-point layout, you will usually need to cut quarter-square triangles to fill in the sides, and half-squa

If you are using an on-point layout, you will usually need to cut quarter-square triangles to fill in the sides, and half-square triangles for the corners of the quilt. The measurements are rounded up, so some trimming may be needed after the top is assembled.

If you need a size that is not listed, scroll down for the formulas and get out your calculator!

Finished Block Size (not including seam allowances)

Cut square size
for side triangles.
Cut each square twice on the diagonal to make 4 triangles.

Cut square size for corner triangles. Cut each square once on the diagonal to make 2 triangles.

5"

8 3/8"

4 1/2"

6"

9 3/4"

5 1/8"

7"

11 1/4"

5 7/8"

8"

12 5/8"

6 5/8"

9"

14"

7 1/4"

10"

15 1/2"

8"

11"

16 7/8"

8 3/4"

12"

18 1/4"

9 3/8"

13"

19 3/4"

10 1/8"

14"

21 1/8"

10 7/8"

15"

22 1/2"

11 1/2"

16"

23 7/8"

12 1/4"

 Other Sizes

Multiply finished square size by 1.414 and add 1.25. Round up to nearest 1/8".

Divide finished square size by 1.414 and add .875. Round up to nearest 1/8".

 


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