What Double Knitting Is and Why You'd Use It
Double knitting is a technique that produces a thick, reversible fabric with a finished pattern on both sides. Instead of knitting a single layer, you work two layers of stitches at the same time on one needle, using two colors of yarn. The result is a fabric that looks identical front and back—no wrong side to hide.
This method is useful for scarves, blankets, and garments where both sides show. Because you're working two layers simultaneously, the fabric is naturally insulated and sturdy. Many knitters use it to create geometric patterns, colorwork designs, or straightforward stripes that appear on both surfaces without any floats or loose threads on the back.
Double knitting does take longer than single-layer knitting because you're essentially making two fabrics at once. Your finished piece will also be heavier and thicker than a comparable single-layer project, which is why it works well for winter accessories.
Key Takeaways
- Double knitting uses two colors of yarn worked simultaneously on one needle to create a reversible, two-sided fabric.
- You hold one yarn color in each hand and alternate between them on every stitch, following a chart to place colors correctly.
- The basic stitch is knit one stitch with the first color, then knit one stitch with the second color, repeating across the row.
- Tension control is critical because uneven tension between your two yarn colors will make the fabric look lumpy or distorted.
- Casting on and binding off require special techniques to keep both layers even and prevent one side from being looser than the other.
Setting Up Your Yarn and Needles
You will need two balls of yarn in contrasting colors and needles one size larger than you would normally use for that yarn weight. The larger needle prevents the fabric from becoming too dense and stiff. Wind each color onto a separate bobbin or ball so you can manage the tension of each independently as you work.
Before you begin, tie the two yarn colors together with a loose knot and practice holding them. Most knitters hold one color in each hand—one in the right hand (English style) and one in the left (Continental style), or both in the left hand with your fingers controlling which one is active. Whichever method you choose, keep the two yarns separate so they don't twist around each other. Twisted yarns create visible bumps in the finished fabric.
Cast on using a provisional cast-on or a two-color cast-on method. The standard long-tail cast-on does not work well for double knitting because it creates an uneven edge. A two-color cast-on uses both yarn colors from the start and ensures both layers are even. Alternatively, cast on with a single color using a provisional method, then pick up stitches with the second color once you're ready to begin the pattern.
The Basic Double Knit Stitch Pattern
The foundation of double knitting is straightforward: knit one stitch with color A, then knit one stitch with color B, and repeat this across the entire row. The key is that when you knit with one color, the other color floats on the wrong side of that stitch. This float becomes part of the second layer.
On the return row (the row going back), you reverse the pattern: knit with color B where you knitted with color A on the previous row, and knit with color A where you knitted with color B. This reversal is what creates the reversible effect. If you follow a chart, the chart shows you which color to knit on each stitch of each row.
The rhythm becomes automatic after a few rows: knit, switch colors, knit, switch colors. Keep your tension even between the two colors. If one color is pulled tighter than the other, the fabric will curl or pucker. Many knitters find it helpful to count their stitches every few rows to catch tension problems early.
Reading a Double Knit Chart and Following Patterns
A double knit chart looks like a standard colorwork chart, but it works differently. Each square represents one stitch, and the color of the square tells you which yarn color to use for that stitch. Unlike Fair Isle or stranded colorwork, you never carry a yarn color across multiple stitches—every stitch uses one color or the other, and the unused color floats directly behind it.
Charts for double knitting are usually read from the bottom up, one row at a time. On odd-numbered rows (1, 3, 5), read the chart from left to right. On even-numbered rows (2, 4, 6), read the chart from right to left. This ensures the pattern appears correctly on both sides. Some patterns provide separate charts for the front and back, which can be helpful if you're new to the technique.
straightforward geometric patterns—stripes, checks, or basic shapes—are the easiest starting point. Once you're comfortable with the rhythm, you can move to more complex designs. Many knitting websites and books offer free double knit charts, and some are specifically labeled as beginner-friendly.
Managing Tension and Avoiding Common Mistakes
Uneven tension is the most common problem in double knitting. If one yarn color is consistently tighter than the other, the fabric will look twisted or distorted, and one side will be noticeably different from the other. To prevent this, keep both yarns at the same distance from your needles and pull each stitch snug with the same amount of force.
Another frequent mistake is accidentally twisting the two yarns around each other. This happens when you switch colors without keeping them separated. Before you knit the next stitch, make sure the new color is positioned correctly and the old color is out of the way. A twisted yarn creates a visible line or bump in the fabric.
Dropped stitches are harder to fix in double knitting because you have two layers to manage. If you drop a stitch, stop when ready and pick it up with a crochet hook before moving on. Trying to fix a dropped stitch several rows later is frustrating and often results in a visible repair.
Casting Off and Finishing Your Double Knit Project
Binding off requires the same attention to evenness as casting on. A standard bind-off will make one layer looser than the other. Instead, use a double knit bind-off, which works both layers simultaneously. The most common method is to knit two stitches with color A, then pass the first stitch over the second, then knit one stitch with color B, pass the first stitch over the second, and repeat this pattern across the row.
Work slowly during bind-off. If you rush, you may accidentally bind off only one layer or create an uneven edge. Some knitters prefer to bind off with a needle one or two sizes larger to keep the edge loose and stretchy.
Once you've bound off, weave in the ends on both sides of the fabric. Because double knitting is reversible, any loose ends will be visible, so take time to hide them neatly. Block your finished piece gently to even out the fabric and set the stitches.
Frequently Asked Questions
Do I need special yarn for double knitting?
No. Any yarn weight works, as long as both colors are the same weight. You'll use roughly twice as much yarn as a single-layer project of the same size because you're knitting two layers. Choose colors with good contrast so the pattern reads clearly on both sides.
Can I double knit in the round?
Yes, but it's more challenging. You'll need to manage two colors on circular needles and keep track of which layer is which as you work around. Most beginners start with flat double knitting (back and forth on straight needles) before attempting circular projects.
What happens if my two layers don't look the same?
Uneven tension between your two yarn colors is the cause. Practice keeping both yarns at equal distance from your needle and pulling each stitch with the same firmness. It usually improves after the first few inches as your hands learn the rhythm.
How much bigger should my needles be for double knitting?
Go up one or two sizes from what the yarn label recommends for single-layer knitting. The exact size depends on how tightly you naturally knit and how dense you want the finished fabric to be. Swatch a small section to test before committing to a full project.
Can I use more than two colors in double knitting?
Technically yes, but it becomes very complicated. You would need to manage three or more yarn colors simultaneously and follow a much more intricate chart. Most double knitting projects stick to two colors for simplicity and clarity.