qst
Calculate cutting sizes for Quarter Square Triangle (QST) blocks. Get exact square sizes for both 2-at-a-time and 4-at-a-time methods.
Frequently Asked Questions
What is a Quarter Square Triangle (QST)?
A QST, also called an hourglass block, is made by cutting a square diagonally in both directions to produce four right triangles. Two contrasting fabrics are sewn together to create the hourglass effect.
What is the formula for QST cutting size?
Add 1-1/4 inches to the desired finished size. For a 4-inch finished QST, cut a 5-1/4 inch square and cut diagonally twice to yield four quarter-square triangles.
What is the difference between HST and QST?
An HST (Half Square Triangle) is cut once diagonally to make two triangles. A QST is cut twice diagonally to make four triangles. QSTs have the straight grain on the longest edge, while HSTs have it on the short edges.