SeeMyQuiltOn-point quilt size calculator
Blocks set on point measure 1.414 times their size across. Enter your layout to see how big the quilt will be.
Finished quilt51" × 68"
- Each block measures 17" corner to corner
- 18 blocks: 12 in the main rows and 6 between them
Diagonal measurement of blocks
| Finished block | Width on point |
|---|---|
| 4" | 5 3/4" |
| 6" | 8 1/2" |
| 8" | 11 3/8" |
| 9" | 12 3/4" |
| 10" | 14 1/4" |
| 12" | 17" |
| 14" | 19 7/8" |
| 16" | 22 3/4" |
How it is calculated
A square turned 45 degrees is as wide as its diagonal: the side times 1.414. Multiply that by the number of blocks across and down.
An on-point quilt has extra blocks sitting between the main rows, so the total is across × down plus (across − 1) × (down − 1).
Questions
How wide is a 12 inch block on point?
About 17". Three across make a quilt center 51" wide.
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