SeeMyQuiltSquare in a square calculator
A center square on point with four corner triangles. Enter the finished size of the whole unit.
Center square4 3/4"
- Corners: 2 squares 3 7/8", each cut once on the diagonal
- For 4 units: 4 center squares and 8 corner squares
- Each unit measures 6 1/2" before sewing
Square in a square cutting chart
| Finished unit | Center square | Corner squares (cut once) |
|---|---|---|
| 3" | 2 5/8" | 2 3/8" |
| 4" | 3 3/8" | 2 7/8" |
| 5" | 4 1/8" | 3 3/8" |
| 6" | 4 3/4" | 3 7/8" |
| 8" | 6 1/4" | 4 7/8" |
| 9" | 6 7/8" | 5 3/8" |
| 12" | 9" | 6 7/8" |
How it is calculated
The center square sits on point, so its side is the finished unit size divided by 1.414. Add 1/2" for seams and round up to the next 1/8".
Each corner triangle has legs half as long as the unit. Cut squares 7/8" larger than that and cut them once on the diagonal: two squares give the four corners.
Sew triangles to two opposite sides of the center first, press, then add the other two.
Questions
Is this the same as an economy block?
An economy block is a square in a square with a second round of triangles added, so the center ends up straight again.
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