A blanket is one of the most rewarding knitting projects you can make

A knitted blanket is large enough to teach you real technique without requiring the precision of a fitted garment, and the finished piece is something you will actually use. Most blankets take between 40 and 100 hours of knitting time, depending on size and stitch complexity. You will need yarn, needles in the right size for that yarn, and a basic understanding of casting on, the knit stitch, and binding off. Everything else—colour changes, texture, shaping—builds from those three skills.

The path from yarn to blanket follows the same steps every time: choose your yarn weight and needle size, pick a pattern or decide on dimensions, cast on the right number of stitches, knit row after row until you reach the length you want, then bind off and finish the edges. This article walks you through each step so you understand what you are doing and why.

Key Takeaways

  • Blanket yarn is usually worsted weight or bulky weight, which knits faster than fingering or sport weight and produces a fabric with good drape.
  • Your needle size must match your yarn weight—the yarn label tells you the recommended range, and using the right size prevents holes or dense fabric.
  • Most blankets are cast on with 120 to 200 stitches and knitted until they reach 40 to 60 inches long, but you can adjust both numbers to fit your space and yarn supply.
  • Garter stitch (knit every row) is the easiest and most forgiving blanket stitch; stockinette stitch (knit one row, purl one row) creates a smoother finish but curls at the edges.
  • Binding off securely at the end prevents your blanket from unravelling, and weaving in yarn ends takes longer than the knitting itself.

Choosing yarn weight and needle size

The yarn label tells you everything you need to know. Look for the weight category—worsted weight and bulky weight are the standard choices for blankets because they knit at a reasonable speed and produce a fabric that drapes well without being too heavy. Fingering weight and sport weight will work but take significantly longer. The label also lists a recommended needle size range, usually something like "US 8–10" or "US 10–11". Start with the middle of that range; if your finished fabric feels too loose or too tight after a few inches, you can switch to a smaller or larger needle.

The relationship between yarn weight and needle size matters because it controls how dense your fabric is. A needle that is too small creates tight, stiff fabric that is hard to knit and uncomfortable to wrap in. A needle that is too large creates loose, floppy fabric with visible holes. The yarn label's recommendation is based on how the yarn behaves at that needle size, so following it saves you from guessing.

For a first blanket, choose a solid colour or a yarn that does not require colour changes. Variegated yarn (yarn dyed in multiple colours) works beautifully and adds visual interest without extra work. Avoid novelty yarns with texture, fur, or loops until you have finished at least one blanket—they hide your stitches and make it hard to see mistakes.

Deciding on size and calculating stitches to cast on

Blanket size is a personal choice. A lap blanket is roughly 40 by 50 inches. A throw is 50 by 60 inches. A bed blanket for a twin bed is 60 by 80 inches or larger. Write down the width you want your finished blanket to be—this is the number of stitches you will cast on. Write down the length you want—this is how many rows you will knit.

To find out how many stitches to cast on, knit a small test swatch in the stitch you plan to use. Cast on 20 stitches, knit 20 rows, then measure the width of that swatch in inches. Divide 20 by the width to find your stitch gauge—how many stitches fit in one inch. Multiply your desired blanket width by that number. If your swatch is 4 inches wide, your gauge is 5 stitches per inch. For a 50-inch-wide blanket, cast on 250 stitches.

Do the same for length. Measure the height of your swatch, divide 20 by that height to find your row gauge, then multiply your desired blanket length by that number. This math takes 20 minutes and prevents you from knitting a blanket that is the wrong size.

Casting on and starting your blanket

Casting on creates the first row of loops on your needle. The long-tail cast-on is the most common method for blankets because it creates a neat, flexible edge that does not curl. You will need a length of yarn roughly three times the width of your blanket. If you are casting on 200 stitches and your gauge is 5 stitches per inch, that is 40 inches of blanket width, so you need about 120 inches (10 feet) of yarn for the cast-on tail.

Once you have cast on your stitches, knit the first few rows slowly and check your tension. Your stitches should be snug enough that they do not slide on the needle, but loose enough that you can move them easily. If you are new to knitting, the first 10 rows will feel awkward; by row 50, your hands will have found a rhythm and your speed will increase.

Many blanket knitters add a border of garter stitch (knit every row) around the edges, even if the main blanket is stockinette stitch. Knit the first 5 stitches of every row and the last 5 stitches of every row in garter stitch, and knit the middle stitches in your chosen pattern. This border prevents curling and adds a finished look.

Choosing a stitch pattern

Garter stitch (knit every row) is the easiest and most forgiving. It creates a bumpy, textured fabric that looks the same on both sides. Mistakes are hard to see, and if you drop a stitch, it does not unravel. Garter stitch blankets take longer to knit because you are working every stitch on every row, but the simplicity means fewer mistakes.

Stockinette stitch (knit one row, purl one row) creates a smooth, flat fabric on one side and bumpy on the other. It knits faster than garter stitch because you alternate between knit and purl rows, but it curls at the edges and mistakes are more visible. Pair it with a garter stitch border to prevent curling.

Seed stitch (alternating knit and purl stitches in a checkerboard pattern) creates a textured, reversible fabric that does not curl. It takes longer than stockinette but is more forgiving than garter stitch. Ribbed stitch (columns of knit and purl) creates a stretchy, textured fabric that is good for blankets that will be washed frequently.

For your first blanket, garter stitch or stockinette with a garter border are the safest choices. Once you have finished one, you will understand your own pace and can experiment with more complex patterns.

Knitting the body and recognizing when you are done

Knit row after row until your blanket reaches the length you calculated. Count your rows every 10 rows or so to make sure you are on track. If you are knitting a 60-inch blanket and your row gauge is 6 rows per inch, you need 360 rows. At 50 rows per hour (a realistic pace for someone with some experience), that is roughly 7 hours of knitting.

As you knit, you will notice your tension becoming more consistent. Early rows may be tighter or looser than later rows, and that is normal. The blanket will look uneven until you wash it, which relaxes the fibres and evens out the tension.

When your blanket reaches the length you want, stop. Do not add extra rows "just to be safe"—measure against your target length and bind off when you hit it. A blanket that is 2 inches longer than planned is still a blanket, but one that is 6 inches longer than planned may not fit where you want it.

Binding off and finishing the edges

Binding off secures the last row so your blanket does not unravel. The standard bind-off works like this: knit two stitches, pass the first stitch over the second and off the needle, knit one more stitch, pass the first stitch over the second and off the needle. Repeat until one stitch remains, cut the yarn, and pull the tail through the last stitch to lock it.

Bind off loosely—if you pull too tight, the edge will pucker and curl. Many knitters use a needle one or two sizes larger for binding off to keep the edge flexible. Take your time on this step; a tight bind-off edge ruins the look of an otherwise beautiful blanket.

After binding off, weave in the yarn ends. Thread the tail onto a yarn needle and run it through the bumps on the back of the blanket for 3 to 4 inches, then trim. Do this for both the cast-on tail and the bind-off tail. Weaving in ends is tedious but necessary—loose ends will catch and pull.

Wash your blanket in cool water with mild detergent, then lay it flat to dry or tumble dry on low heat. Washing relaxes the fibres, evens out tension, and softens the fabric. Your blanket will look noticeably better after its first wash.

Frequently Asked Questions

How much yarn do I need for a blanket?

Multiply your desired blanket width in inches by your desired length in inches, then divide by 1,000. That gives you a rough yardage estimate. A 50-by-60-inch blanket needs roughly 3,000 yards of worsted weight yarn. Check the yardage on your yarn label and buy enough to reach that total, plus 10 percent extra for mistakes.

What if I make a mistake in the middle of a row?

If you notice the mistake right away, drop back to that stitch, fix it, and pick the stitches back up. If you do not notice until several rows later, you can either unravel back to the mistake or leave it—in garter stitch, small mistakes disappear after washing. In stockinette, they are more visible, so unravelling is worth the time.

Can I knit a blanket in multiple colours?

Yes, but it requires learning to carry yarn across the back of your work (stranding) or switching colours at the edge of sections. For a first blanket, a single colour or variegated yarn is simpler. Once you finish one blanket, colour work becomes much easier.

How long does it take to knit a blanket?

A garter stitch lap blanket takes 40 to 60 hours. A stockinette throw takes 50 to 80 hours. A bed-sized blanket can take 100 hours or more. Your actual time depends on your knitting speed, which increases with practice, and how often you knit.

Do I need to block my blanket after knitting?

Blocking (pinning the blanket to shape and letting it dry) is optional for blankets. Washing and laying flat to dry accomplishes most of what blocking does. If your blanket has uneven edges or curling, blocking helps, but it is not required.