Casting on creates the first row of loops on your needle
Casting on is how you place the initial loops—called stitches—onto your knitting needle before you start knitting. Without a cast-on row, you have nothing to knit into. The loop you create stays on the needle and becomes the foundation for every row that follows. Most knitters learn one or two cast-on methods and use them for nearly every project.
The method you choose depends on what you are making and how much stretch or structure you want the edge to have. A stretchy cast-on works well for ribbed cuffs on socks or sweaters. A firm cast-on suits edges that need to hold their shape, like the top of a bag. The good news is that all cast-on methods follow the same basic principle: you are looping yarn around a needle in a controlled way.
Key Takeaways
- The long-tail cast-on is the most common method and works for most projects because it creates an edge that is both elastic and neat.
- The cable cast-on produces a firm, structured edge and is often used when you need the cast-on row to hold its shape.
- The backward loop cast-on is the fastest method but creates a loose, stretchy edge that can look uneven on finished garments.
- The provisional cast-on is designed to be removed later, making it useful when you plan to pick up stitches from the cast-on edge.
Long-Tail Cast-On: The Most Practical Method
The long-tail cast-on is the method most knitters reach for first. It creates an edge that is both elastic and finished-looking, and it works well on nearly every project. The name comes from the fact that you leave a long length of yarn—the "tail"—before you begin casting on.
To do a long-tail cast-on, first measure out a tail of yarn. A rough guide is to allow about one inch of tail for every stitch you plan to cast on, though this varies depending on your yarn thickness. Tie a loose knot at the end of the tail to mark it. Hold the needle in your right hand and drape the yarn so the tail hangs over your left index finger and the working yarn (the yarn attached to the ball) hangs over your left middle finger. Use your thumb and index finger to hold the two strands apart, creating a V shape with the yarn. Insert the needle up through the loop on your thumb, then across and through the loop on your index finger, then back down through the thumb loop. Tighten gently. Repeat this motion until you have cast on the number of stitches you need.
The long-tail cast-on takes practice to keep even tension, but once you develop the rhythm, it becomes automatic. Many knitters find it meditative.
Cable Cast-On: For Edges That Need Structure
The cable cast-on creates a firm, rope-like edge that does not stretch much. Use this method when you want the cast-on edge to hold its shape—for example, on the top edge of a structured bag or the neckline of a fitted garment.
Start by casting on two stitches using the long-tail method (or any method you know). Then insert your needle between the two stitches on the left needle, wrap the yarn around the needle as if you were knitting, and pull the new loop through. Place this new loop on the left needle. You now have three stitches. Repeat this process, always inserting the needle between the last stitch and the one before it, until you reach your target number of stitches.
The cable cast-on is slower than the long-tail method because each new stitch requires a separate knitting motion. However, the resulting edge is very durable and looks professional on finished pieces.
Backward Loop Cast-On: The Fastest Option
The backward loop cast-on is the quickest method and requires only one needle. It is useful when you need to cast on stitches quickly or when you are adding stitches mid-project. However, the edge it creates is loose and stretchy, and it can look uneven on finished garments, so it is not the best choice for visible edges.
To do a backward loop cast-on, make a loop with the yarn and place it on your needle. Then, holding the yarn in your hand, wrap it around your thumb to create another loop, insert the needle through that loop, and pull the yarn tight. Repeat until you have cast on all your stitches. Each stitch takes only a few seconds, which is why this method is popular for casting on large numbers of stitches or for practice swatches.
Provisional Cast-On: When You Plan to Unravel the Edge
A provisional cast-on is designed to be removed later so you can pick up the stitches from the cast-on edge and knit in a different direction. This technique is useful for projects like shawls, blankets, or sweaters where you want to add a border or second section that starts from the original cast-on edge.
The most common provisional cast-on uses a crochet hook and waste yarn (a length of yarn you will throw away later). Tie the waste yarn to your knitting yarn, then use the crochet hook to chain the number of stitches you need. Knit into each chain with your knitting yarn and needle. When you are ready to remove the provisional cast-on, you straightforward pull the waste yarn and the chains unravel, leaving live stitches on your needle that you can knit with.
Provisional cast-ons take a bit longer to set up than other methods, but they are invaluable for certain construction techniques. If you are new to knitting, you can skip this method for now and come back to it once you are comfortable with the basics.
Tension and Consistency: What Matters Most
Whichever cast-on method you choose, the most important thing is to keep your tension even. Stitches that are too tight will be hard to knit into on the first row, and stitches that are too loose will create a sloppy edge. Tension comes with practice, so do not worry if your first cast-on row looks uneven.
A helpful tip is to cast on using a needle one or two sizes larger than the needle you will use for the body of your project. This makes the cast-on stitches easier to work into and creates a slightly more elastic edge. Once you have cast on, switch to your regular needle size and begin knitting.
Practicing Cast-Ons Before You Start a Project
If you are new to knitting, spend time practicing cast-ons on scrap yarn before you begin an actual project. Cast on 20 or 30 stitches using the long-tail method, knit a few rows, then bind off and unravel. Do this several times until the motion feels natural. Then try the cable cast-on and the backward loop cast-on so you understand how each one feels and looks different.
Once you have practiced, choose the long-tail cast-on for your first project. It is the most versatile method and will serve you well across many different types of knitting. As you gain experience, you will naturally learn when to use the other methods.
Frequently Asked Questions
How do I know how long to make the tail for long-tail cast-on?
A common rule is one inch of tail per stitch, but this depends on your yarn weight and tension. For thin yarn, you may need less; for thick yarn, you may need more. If you are unsure, leave extra tail—you can always trim it later. It is better to have too much than to run out halfway through.
What if I cast on too many or too few stitches?
If you realize the mistake before you have knitted more than a row or two, straightforward unravel back to the cast-on and try again. If you have already knitted several rows, you can add or remove stitches using a technique called increasing or decreasing, but it is easier to start over if you are still learning.
Can I use any cast-on method for any project?
Most projects work with the long-tail cast-on, but some patterns specify a particular cast-on method because it affects how the edge looks or behaves. Always check your pattern's instructions. If no method is specified, the long-tail cast-on is a safe default.
Why does my cast-on edge look twisted?
A twisted cast-on usually means the stitches were placed on the needle in the wrong direction. When you cast on, make sure each loop sits on the needle the same way—the working yarn should come out of the top of the loop, not the bottom. This takes practice to see, but checking this detail will make your edges look much neater.