How To Make Half Square Triangles — Method Four

Can you guess how many HST I’m gonna make today?

I’ve showed you how to make TWO, FOUR and EIGHT half square triangles pieces at a time.


I’m doing SIXTEEN, today!!!

For this project, I used:

Cut two identical squares from different fabrics.

Stack the squares so that the right sides of the fabric are touching.

Using a pencil, make a 3×3 grid. Then create diagonal marks crossing through the grid in one direction.

Sew two seams ¼” on both sides of each diagonal line.

Cut along all the lines you marked — horizontal, vertical and diagonal.

Use a seam ripper to open up the top of each HST. Press each HST open and trim dog ears.

I think this method is easiest if you start with a square that has a beginning measurement that is a multiple of 3. It just makes creating the initial grid easier.

Again, when you are creating HST in bulk from one square, you have to start with a larger piece of fabric, which means you really don’t want to screw this up. So, be careful and make sure your ruler doesn’t slip when you’re making your cuts.

Obviously you can use this method to get more and more HST from one set of squares, but at some point, the larger pieces of fabric that you’re starting off with is going to become hard to handle. Just keep that in mind before you start planning on making 144 HST at one time.

Don’t say I didn’t warn you!

Disclaimer: I included affiliate links to all the tools I used for this project. They don’t make my sewing machine anymore, but the one I linked is a new and improved version! 


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