Testing your 1/4" Seam Allowance Accuracy

One of the key elements of piecing any quilt pattern is making sure your have a true and accurate 1/4" seam allowance.  There is one way to test to make sure you have a true 1/4" seam allowance.

Cut 3 strips 1 1/2" x 4" (approximately), using 2 different fabric colors.  Sew 2 of the different fabrics together along the length of the strips.  Then sew the remaining strip on the opposite end. Press the seams toward the center.

Now, using a ruler measure the center it should measure 1".  If the seam doesn't measure 1" your will need to adjust your needle positions. The picture below shows the seam allowance is just short of the 1" so the needle position will be adjusted slightly.

After making the adjustment retest by make another set of strips and remeasure the strips, they should measure out like the picture below.

If you don't find your correct adjustment, Be Patient, just keep adjusting and retesting until you find the correct setting.  Once you have the correct adjustment, it will make pay off on your next project.

How do you test your Seam Allowance Accuracy?  Comment Below!


Have a Great Sewing Day,

Tina