Half-Square Triangles


When you’re new to quilting, things look much more challenging than they actually are. As dumb as it sounds, I avoided anything involving triangles for a long time because I didn’t know how to make them and just assumed they were difficult. Thank heavens I learned! They are unbelievably easy and fun!

To make a pair of half-square triangles, you need two fabric squares of equal size. In this example, I am using two 5″ squares. On the wrong side of the lighter square, draw a diagonal line using a ruler and pencil or pen.

Face the marked square right sides together with your other 5″ square.
After aligning the raw edges, pin the squares in place so they won’t shift as you sew them.
Next, use 1/4″ seam allowance to sew along both sides of the marked line.
Carefully cut along the drawn line to yield two [folded] half-square triangles.
Unfold each half-square triangle block and iron the seams open and flat.
You end up with two of these beauties! Unbelievably easy, right?
Then all you have to do is make a few more and start making fun things with them. Like a pinwheel.

Or a spunky chevron quilt.


To celebrate my love of half-square triangles, I am offering 20% off my popular Perfect Pinwheels & Zigzag Frenzy PDF pattern for the month of June.  Just use promo code HST2012 at checkout and the full pattern will be e-mailed to you instantly!



  1. deebriese

    May 31, 2012 at 1:09 pm

    You give me the confidence to quilt. Thank you. I am stuck right now on a quilt and After reading this I am going back for another try. :0)

  2. ~Damita's Pretty Wrap~

    May 31, 2012 at 2:44 pm

    Thanks for the good advice! It does look easy! 🙂 🙂 Love that quilt too! Have a great rest of the day! xo Holly

  3. *katie

    May 31, 2012 at 7:33 pm

    Wow, are you sure it's really that easy? I will definitely be giving this a try! Thanks for the tutorial 🙂

  4. The Packers

    June 4, 2012 at 7:37 am

    I have been wanting to make another quilt and the triangles have scared me a little but after your quick tutorial on how to do it, it doesn't seem hard at all. Thanks

  5. Stephanie

    June 5, 2012 at 9:31 am

    Love that zig zag quilt! Looking forward to getting to know you a little better on HBL too 🙂

Leave a Reply