Calculating Corner Triangles:

1. Divide the finished block size by
2. 1.414 and add 0.875” (7/8”).
3. Round this up to the nearest 1/8”
4. (10” divided by 1.414 = 7.07;
5. 7.07 + 0.875 = 7.95 or 8”)

Calculating Side Triangles:

• Multiply the finished block size by 1.414 and add 1.25” (1-1/4” for seam allowances. (10”x1.414 = 14.14”; 14.14” + 1.25” = 15.39 or 15-1/2)

Finished Block Size 2”	Square size for corner triangle 2-3/8”	Square size for side triangle 4-1/8”
3”	3”	5-1/2”
4”	3-3/4”	7”
5”	4-1/2”	8-3/8”
6”	5-1/8”	9-3/4”
7”	5-7/8”	11-1/4”
8”	6-5/8”	12-5/8”
9”	7-1/4”	14”
10”	8”	15-1/2”
12”	9-3/8”	18-1/4”
14”	10-7/8”	21-1/8”
16”	12-1/4”	23-7/8”
18”	13-5/8”	26-3/4”
20”	15-1/8”	29-5/8”
24”	17-7/8”	35-1/4”

Diagonal Measurement of Standard size blocks

2” block	2-7/8”
3” block	4-1/4”
4” block	5-5/8”
5” block	7-1/8”
6” block	8-1/2”
7” block	9-7/8”
8” block	11-1/4”
9” block	12-3/4”
10” block	14-1/8”
12” block	17”
14” block	19-7/8”

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