Half-Square Triangle Measurements & Printable Guide
Keep your half-square triangle measurements close to your cutting mat! This printable reference brings together five ways to make HSTs, whether you need just a pair or a whole stack for your next quilt.
Download the printable guide
Download the Half-Square Triangle Reference PDF
Six printer-friendly pages • US Letter • Version 1.0, October 13, 2026
What’s inside
A quick cutting chart for finished HST sizes from 1/2 inch to 9 1/2 inches.
Starting-square measurements for making 2, 4, 8, 16 or 32 HSTs at a time.
A separate illustrated instruction page for every method, including 16 at a time.
Finished-size and trim-to-size reminders, plus tips for handling bias edges.
How to use the chart
Find the finished size your quilt needs, then choose your batch size. Cut two squares at the listed measurement—one from each fabric. The measurements include a little extra room so you can press and trim each HST to the size in the “Trim to” column.
Use a 1/4-inch seam and make a test pair before cutting fabric for an entire project. The 4- and 16-at-a-time methods leave stretchy bias edges, so handle those units gently.
Print just what you need
Print page 1 for a quick reference, or add the instruction pages for the methods you use most. The diagrams show sewing and cutting lines; they are not cutting templates.
A resource we can keep growing
Bookmark this page for future additions. The current download is version 1.0; as more methods or measurements are added, I can update the guide here so everything stays in one easy-to-find place.
For more quilting projects and sewing tips, visit April’s Craft Room on YouTube. Happy sewing!
