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. Without cast-on stitches, you have nowhere to start knitting. The loop you create stays on the needle, and you build your fabric by pulling new yarn through it. Different cast-on methods create different edges, and some are easier to learn than others.
You will use one of four main methods depending on what you are making and how much experience you have. The long-tail cast-on creates a flexible, finished edge and works for most projects. The thumb cast-on is the fastest to learn. The cable cast-on makes a sturdy edge. The provisional cast-on is used when you need to pick up stitches later. Start with thumb or long-tail, and you can make almost any garment.
Key Takeaways
- Thumb cast-on is the fastest method to learn and requires only one needle and one length of yarn.
- Long-tail cast-on creates a professional-looking edge and works for most knitting projects, but requires measuring yarn beforehand.
- Cable cast-on produces a sturdy edge and is useful when you need extra structure at the bottom of a piece.
- You need only a needle, yarn, and your hands—no special tools—to cast on using any of these methods.
Thumb cast-on: the simplest method
The thumb cast-on is the easiest method to learn because it uses only one needle and does not require you to measure yarn. Make a loop with your yarn, leaving a tail about 6 inches long. Put the loop on your needle, then hold the needle in your right hand and the yarn tail in your left hand between your thumb and forefinger.
Push your thumb up through the loop on the needle, then wrap the working yarn (the yarn coming from the ball) around your thumb from left to right. Pull the needle down and forward through the loop around your thumb, then slip your thumb out. You now have two stitches on the needle. Repeat this motion until you have as many stitches as you need. The edge will be loose and stretchy, which works well for scarves, blankets, and practice pieces.
Long-tail cast-on: the most common method
Long-tail cast-on creates a finished, professional edge and is the standard choice for fitted garments like sweaters and socks. The trade-off is that you must measure your yarn tail before you start. A rough guide: for every stitch you want to cast on, you need about one inch of yarn tail. If you want 60 stitches, measure out 60 inches (5 feet) of tail.
Make a loop with your measured tail, leaving the working yarn (from the ball) separate. Put the loop on your needle. Hold the needle in your right hand. With your left hand, hold both the tail and the working yarn between your thumb and forefinger, with the tail over your thumb and the working yarn over your finger. Push the needle up through the loop on your thumb, then over and down through the loop on your finger, then back down through the thumb loop. Slip your thumb out. You now have two stitches. Repeat until you reach your target number. This method takes practice but creates an edge that looks like you knitted it.
Cable cast-on: for a sturdy edge
Cable cast-on makes a firm, structured edge that does not stretch much. Use it when you need the bottom of your piece to hold its shape—for example, at the cuff of a sock or the hem of a fitted sweater. It requires two stitches to start, so begin with a thumb cast-on or long-tail cast-on to place two stitches on your needle.
Hold the needle with the two stitches in your left hand. Insert a second needle from left to right between the two stitches. Wrap the working yarn around the right needle and pull it through to create a new loop. Place this new loop on the left needle. Now insert the right needle between the last stitch you made and the stitch before it, wrap the yarn, and pull through again. Repeat this process, always inserting between the newest stitch and the one before it. Cable cast-on is slower than the other methods but gives you a dense, professional-looking edge.
Provisional cast-on: when you need to pick up stitches later
Provisional cast-on uses a temporary yarn in a contrasting color so you can remove it later and pick up the stitches. This method is useful when you are knitting a piece that will be joined to another piece, or when you want to add a border after the main knitting is done. You will knit normally with your main yarn, then later pull out the temporary yarn and work the exposed stitches.
Use a crochet hook and temporary yarn to chain the number of stitches you need, plus two extra. Slip the chain onto your needle. Knit into the back bump of each chain stitch with your main yarn. When you are ready to pick up those stitches, carefully pull out the temporary yarn one loop at a time, and the original stitches will be exposed on your needle. This method takes a little practice to avoid dropping stitches, but it opens up many design possibilities.
Common mistakes when casting on
The most common mistake is casting on too tightly, which makes the first row hard to knit and creates an uneven edge. If you find yourself struggling to insert your needle into the cast-on stitches, you cast on too tight. Practice keeping your tension loose and even. Another mistake is miscounting your stitches. Count them on the needle before you start knitting, and recount after every few rows until you are confident.
A third mistake is measuring the tail wrong in long-tail cast-on. If you run out of tail before you finish, you will have to start over. It is better to measure too much tail than too little—you can always cut off the extra. Finally, do not worry if your first cast-on row looks messy. The edge will even out as you knit the first few rows, and the imperfections will be less noticeable once the piece is finished and blocked (wet and shaped to size).
Choosing the right cast-on for your project
Thumb cast-on works for scarves, blankets, dishcloths, and anything where a loose edge is acceptable. It is also the best choice when you are learning, because you can focus on the motion without worrying about measuring yarn. Long-tail cast-on is the standard for fitted garments, socks, and anything that needs a professional finish. Cable cast-on is best for pieces that need structure, like the cuffs of socks or the waistband of a fitted sweater. Provisional cast-on is for advanced projects where you plan to pick up stitches later.
If you are not sure which method to use, check the pattern instructions—most patterns will specify. If the pattern does not specify, long-tail cast-on is almost always the right choice. As you gain experience, you will develop a feel for which method works best for different situations.
Frequently Asked Questions
What if I drop a stitch while casting on?
If you drop a stitch during casting on, straightforward pick it back up with your needle before you move on. If you do not notice until you have already started knitting, you can use a crochet hook to pull the dropped stitch back up through the rows. It is easier to fix a dropped stitch right away, so count your stitches frequently as you cast on.
How tight should my cast-on stitches be?
Cast-on stitches should be snug enough to stay on the needle but loose enough that you can insert your working needle through them easily. If you have to force your needle in, your tension is too tight. Practice on scrap yarn until the motion feels natural and your stitches sit evenly on the needle.
Can I use the same cast-on method for every project?
Yes. Long-tail cast-on works for almost every knitting project, so if you learn only one method, make it that one. Once you are comfortable with long-tail, learning the other methods will be much easier because you already understand how stitches form.
Do I need to cast on with the same yarn I am knitting with?
For most projects, yes. However, provisional cast-on uses a temporary yarn that you remove later. Some knitters also use a thicker yarn to cast on, then switch to their main yarn for the first row, which can make the edge easier to work with. Experiment once you are comfortable with the basic methods.