How to Strip Piece Nine-Patch (9 Patch) Quilt Blocks | New Quilters

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blankThis week’s easy quilt block is made of nine small fabric squares arranged in a checkerboard pattern. The graphic above shows the two kinds of nine-patch blocks you can make from two fabrics. That’s what I will show you how to do in this post.

Supply List 

Here’s what you will need:

  • Fabric strips in two colors, one lighter and one darker
  • Rotary cutter
  • See-through cutting ruler
  • Cotton or polyester thread in a neutral color like beige or pale grey. I use 40- or 50-weight cotton thread from Aurifil.

You will also need your sewing machine, of course. If you have one, a 1/4″ quilting foot makes it easier to sew accurate seams. If not, I recommend making yourself a homemade 1/4″ seam guide with painter’s tape.

Sizing Your Block and Fabric Strips 

Before you start cutting, you need to decide how big you want the finished block to be. This determines how wide to cut your strips. This chart shows you how wide to cut your strips to make blocks of various sizes:

Table showing how wide to cut fabric strips for various size 9-patch quilt blocks

Cutting the Strips

For each block, you will need to cut three strips each of the light and dark fabrics (or buy precut strips called jelly rolls at the local quilt shop.) blankThese instructions assume that you cut the strips for these blocks across the full width of your fabric, from selvage to selvage. The table below shows you about how many finished blocks you can make from each set of six strips. (The precise number you will get depends on the usable width of the fabrics, which varies from manufacturer to manufacturer.)

Table showing how many 9 patch blocks a set of fabric strips will make.

Sewing the Fabric Strips into Strip Sets

After you cut the strips, you will sew them into two sets of three strips each. One strip set has two dark strips on the outside and a light strip in the center, like this: blank The other strip set has two light strips on the outside and a dark strip in the center, like this: blankHere’s how to sew the strip sets together:

  1. Lay one strip of light fabric and one of dark fabric with right sides together.
  2. Sew along one long side of the paired strips with a scant ¼” seam, then press the seam toward the darker fabric.
  3. Sew a third strip to the strip set so the light and dark strips alternate. It’s good to sew in the opposite direction than you did the first time. This helps keep the strip set straight. blank
  4. Press the seam toward the darker fabric.
  5. Sew the second set of strips together, pressing the seams toward the darker fabric. blank

Cross-Cutting the Strip Sets

Next, you will cut the strip sets into smaller units.

  1. Lay the two strip sets with right sides together so the seams nest. If you pressed all the seam allowances toward the darker fabric, the strips should fit together neatly. blank
  2. Use your rotary cutter and a cutting ruler to cut sub-units from the paired strip units. blank
    The sub-units should be the same width as the original strips. For example, if the fabric strips were 1½” wide, cut the sub-units 1½” wide.  The strips in these blocks were 2-1/2″ wide, so I cut the strip sets into 2-1/2″ sub-units. blank

Assembling the Strip Sets into Nine Patch Blocks

The last step is to sew the sub-cut units together.

  1. Count the sub-units and set aside one third of them. You will use those to complete the blocks later.
  2. Sew together the remaining two thirds of the nested sub-units, joining each pair along one long side.
  3. Use chain piecing to save thread and speed up the stitching. Press the seams to one side.
  4. Separate the last third of the sub-cut units so they are no longer nested together.

Sewing Positive or Negative Nine Patch Blocks

At this point, you can choose to make two different kinds of nine patch blocks — positive blocks, where the darker fabric anchors the four corners, or negative blocks, where the lighter fabric anchors the corners. This photo shows a negative block on the left and a positive block on the right. blankSome quilt patterns call for positive nine-patch blocks, some call for negative blocks, and some call for both. Once you decide whether you want to make a positive or negative block, you can sew the final sub-unit onto the block. Here’s what to do.

  1. Sew the last sub-unit to the larger section. Position the units like this to make a positive block: blankand like this to make a negative block. blank
  2. Press the blocks and square them up. They are now ready to use in a quilt.

Here are the two blocks that came from the strip sets you saw in this tutorial. Here’s the positive block: blank

And here’s the negative block: blank

And to inspire you to use nine patch blocks in a quilt of your own, here’s a nine-patch quilt I made a few years ago. I got the pattern from one of my favorite easy quilt books, Judy Sisneros’ 9-Patch Pizzazz. I wish I’d taken better photos of this quilt! blank




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