Yarn Substitution

Substituting yarn

The question comes up every so often at the knitting meet-up and in the Ravelry forums. It takes the form of “Can I use this yarn instead of that yarn?” and any of a number of variations. And the answer is almost always: “It depends.”

Oh, we want this answer to be a simple “Yes”. But it seldom is. Usually the knitter has a valid reason for wanting to use a different yarn than what was used in the printed pattern: Lack of availability, wanting/needing a different colorway, dislike of the particular yarn, etc. If the knitter happens to select a yarn of similar weight and make-up, the substitution will probably go reasonably well – providing, of course, that the knitter can achieve the stated pattern gauge with the chosen yarn. This is the happiest of all occurrences – the yarn you want to use works out well with the pattern and you can just relax and knit happily on your project.

The subject of matching gauge could constitute the contents of an entire article, if not a book. For the sake of brevity, I will simply state that gauge is essential and that any knitter who wishes to produce a well-fitting garment needs to pay attention to gauge – IF she is following a pattern that contains the concept of “fit” as part of the design. (Gauge is less important with scarves & shawls).

Lindy’s Advice #1: When substituting yarns, it is best to select a yarn that is of the same weight and has the same characteristics as the original yarn. But do a gauge swatch to make certain you do not need to make adjustments so that the garment fits correctly.

Perhaps the most frustrating of experiences with yarn substitution is the situation where you have selected a yarn of similar weight and characteristics – but try as you may, you cannot achieve the stated gauge. The advice is usually to go up a needle size or two if your gauge has more stitches and to go down needle sizes if your gauge has fewer stitches. If this works, then wonderful! Proceed with the project. But if, in spite of the change in needle sizes, you still cannot get the stated gauge – well, this can be a significant problem. Being off a half a stitch doesn’t seem like much, but when multiplied over a large number of stitches (say 100 or more), it becomes quite significant and the result is a garment that doesn’t fit properly. You have two options in this situation: 1) try a different yarn (yep, try another one) ; or 2) get out your calculator and start calculating the adjustments needed to ensure a proper fit.

Note: If math makes you anxious and you would never consider recalculating the number of stitches you need to make the garment using your yarn and your gauge – then skip this next part.

Here are the basic calculations you’ll need to make the appropriate adjustments:

Pattern Gauge states “20 stitches and 20 rows = 4 inches” (5 stitches/inch and 5 rows/inch)

To adjust pattern width (i.e. your stitch gauge is different):
Your stitch gauge is 22 stitches = 4 inches. Which is 5.5 stitches per inch

Pattern instructions state that the back of the garment measures 25 inches at the bottom and says to cast on 125 stitches. To adjust for your gauge, you would need to cast on 25 X 5.5 = 137.5 stitches – you will need to round down to 137 stitches so that you have an odd number of stitches, since the pattern has an odd number.
You will need to make similar calculations for width measurements throughout your pattern – it is best if you go through and do this before you starting knitting.

Adjusting pattern length may or may not require some math. If the pattern has instructions that use length (inches) rather than rows, it really isn’t necessary to calculate the number of rows required with your gauge, because you can simply knit to the desired number of inches.

However, if the pattern contains instructions such as “knit 40 rows then begin shaping” – you may want to calculate the adjustments needed, as follows:

Your row gauge is 30 rows = 4 inches – which is 7.5 rows per inch

Pattern row gauge is 20 rows = 4 inches (5 rows per inch)
To calculate the number of rows you need to knit to be equal to the 40 rows called for in the pattern :
40 rows ÷ 5 rows/inch = 8 inches
8 inches X 7.5 rows/inch = 60 rows – so instead of knitting 40 rows then begin shaping, you would knit 60 rows.

A shortcut in these calculations would be to go through and calculate the number of inches that need to be knit using the row gauge of the pattern and then just knitting to the calculated length.

This can be a daunting bit of calculation – but it will result in a better fitting garment with your desired choice of yarn and is thus, worth the effort.

So far, I have discussed what considerations are needed when substituting a yarn of similar weight and characteristics with another. Now about substituting an entirely different weight of yarn…

I have attempted this several times and have not been happy with the result each time. Hence, Lindy’s Advice #2: No matter how much you love the yarn you want to substitute and the pattern, if the yarn is not the same weight and/or does not have the same characteristics as the yarn used in the pattern – DO NOT use that yarn with that pattern.

I know, I know – you really want to use this yarn, but it’s like trying to fit a square peg in a round hole. I feel your pain, I really do. But don’t do it, you won’t be happy with the result.

I think every knitter has tried using bulky yarn for a worsted weight pattern or visa versa. The results have probably been disappointing and the garment was either too big or too small. It certainly was for me.

I know of many knitters who have attempted to double-strand worsted weight or sport weight yarn to substitute for bulky weight. It can be done with some success, but once again – you have to do a gauge swatch and make the necessary adjustments for differences between your gauge and the pattern gauge. You just can’t get away from the math…

But wait! There is a way to substitute yarn so that it doesn’t drive you crazy: “Free yourself from the pattern”.

Huh? What do I mean by that? Well, as a knitter you will eventually reach a point in your knitting experience when you begin to understand the basics of garment design and construction. Granted there are literally hundreds of thousands of written sweater patterns available. But any sweater has a front, a back, two sleeves and a neck. If you understand how to construct the basic parts and match them to your desired body measurements – you really don’t need a specific written pattern.

Let’s start with that pattern you want to knit with a different weight of yarn. What are the characteristics of the garment? How are the sleeves shaped? How is the front shaped and how is the back shaped? What do you like about this pattern?

Does the pattern use a textured stitch patterning or does it have a particular colorwork patterning? Are there charts for the stitch pattern(s) or the colorwork pattern(s)? You can use these to make your own customized sweater with your chosen yarn.

How? Well, it will require some thinking, some planning, some math (sorry!) and a very good set of body measurements. Armed with the knowledge of sweater design – you can go from carefully following a written pattern to using the pattern as an inspiration for your own custom designed sweater.

I will outline how to do this in my next post. Off to find my sweater design references…

1 thought on “Yarn Substitution”

  1. This is really helpful.

    Maybe in the sweater design part you could answer questions about sizing? What if your pattern doesn’t have your size?

Comments are closed.

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There was a great deal of discussion about what stitch was used for the hat, but most of the comments were in favor of either the daisy (star) stitch or the trinity (bramble) stitch. So, I decided to give the trinity stitch a try — and here is the end result:
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Pretty close, I think.

I knit the hat using Paton’s Classic Wool yarn on size US 8 (4.5 mm) needles. Colorway is “Bright Red”. I also wrote the pattern for this hat as I knitted it up, so that I could share it with others. Here’s a link if you’d like to download it: Trinity Stitch Slouchy Hat.

I had to convert the Trinity Stitch Pattern so that it could be used in the round. Directions for the trinity stitch knit in the round are included in the pattern. If you download this pattern and enjoy knitting your own hat, please leave me a comment. 🙂

To see my notes on Ravelry — use this link.

Next post — Beret in Bee Stitch.

Combinations of Knit & Purl – Simplicity or Complexity?Combinations of Knit & Purl – Simplicity or Complexity?

The other day while waiting for my MIL at the beauty shop, I took out my baby blanket and sat knitting in the waiting area. One of the stylists came up to me and asked me what I was knitting. So I showed her. Then she said, “I could never knit anything like that – it’s too complex.” I replied that this pattern was actually very easy – it was just a three different combinations of knit and purl stitches, and I showed her the graph of the pattern square. She then told me that she had once knitted a sweater for her granddaughter that had a color pattern of a frog. So, I told her that if she had done that type of color knitting, this textured pattern would be easy for her to do. She replied that “maybe, she could do it – BUT she didn’t think she’d ever be able to master anything like cables”. So in spite of my gentle encouragement, I’m not certain this knitter will try to knit something with a variety of textures – which is too bad, because she will miss out on some wonderful knitting projects.

Have you ever limited your knitting by such thinking? I know I did many years ago – but after discovering Elizabeth Zimmerman’s approach to “unventing” things, my perspective has changed greatly. I’d like to encourage all my readers to think about this. There is a lot of freedom in being able to take a printed pattern and view it not as something that has to be followed exactly, but more as a place to start something uniquely yours. BTW – if you have never read Elizabeth Zimmerman’s books – you are missing an absolutely fun and enlightening experience!

As I spend time knitting my baby blanket, I find myself marveling at how those two basic stitches – the Knit Stitch and the Purl Stitch – can be combined in endless ways to make up fascinating textures. Consider the sheer simplicity of these two stitches. They are just opposites of each other. Yet these two stitches are knitting up nicely into teddy bear squares surrounded by seed stitch borders. And this project is rather simple. Then consider an Aran sweater pattern as an example of a far more complex combination of textured patterns – but again, the textures are made by the way one combines the basic knit and purl stitches and applies techniques such as cabling. Thus, knitting is both simple and complex and filled with unlimited possibilities of variation and combinations. No wonder we knitters love to knit!

Things Learned from a SwatchThings Learned from a Swatch

It took me years to appreciate the value of doing a swatch before starting a knitting project. I cannot tell you how many poorly fitted sweaters I knit before I came to realize that it truly was worth the time and effort to swatch first.

I learned this when I bought my first knitting machine. You see, when you are using a knitting machine, you can’t even get started without doing that swatch – as you need it to tell you if you have your machine tension set up correctly. It only takes one frustrating experience with a too tight tension on the knitting machine to convince you of the necessity for doing a swatch or two.

Swatching also provides you as a knitter the freedom to become, as Elizabeth Zimmermann says, “The boss of your knitting”. If you know your gauge, and understand the basics of the design you are wanting to make – you are free to modify any pattern – or MAKE YOUR OWN.

So, I always swatch. This last weekend I did a swatch using the Baby Ull yarns that I purchased to knit a sweater and romper for my new grandson due the end of January. I had a couple of extra reasons for doing this swatch beyond determining what size needle I needed to obtain the stated pattern gauge. First, I wanted to try out the three color pattern for the sweater and get comfortable with it. Second, I wanted to see if I liked the color combinations of the yarns in the color pattern.

Swatch_Cardigan1 Here’s a picture of the swatch. I cast on 44 stitches so that I could have a 40 stitch area surrounded by a 2 stitch garter stitch edging. I started using US 2 (3.00 mm) needles and then switched to a smaller US 1 (2.50 mm) needle for the last part of the swatch. I did a section of garter stitch, then stockinette stitch, then the color pattern using the lighter aqua blue as the main color and then switched to using the darker teal blue as the main color. I finished the swatch by doing a section of sockinette stitch on the smaller needles, followed by a section of garter stitch.

Here’s what I learned from this swatch: 1) I need to use smaller needles than what is stated in the pattern in order to obtain gauge. This is important because I want this sweater to fit. 2) I like using the darker teal blue as the main color – I think the lighter aqua blue shows up better against it than the other way around. This is significant – because I bought 7 balls of the lighter aqua and only 1 ball of the darker teal. (I have now ordered enough teal to make the sweater, as my LYS did not have enough of it on hand…) 3) The 3 color pattern is fairly simple and easy to knit. I think it’s good to practice such things before starting off on a special project like this.

So to those readers who “hate to swatch”: do you see the value of what I did here? Swatching is a valuable technique that helps you be the “boss of your knitting”. Now go swatch!