Helpful Swatch Part 5: Substituting One Yarn for Another

Many times a knitter will select a pattern to knit only to discover that the yarn used in the pattern is either not available or there isn’t a sufficient quantity available for purchase or it costs more than what the budget allows. So, that leads to finding a reasonable substitute to use. I have seen many forum posts in Ravelry where knitters have had difficulty making a proper substitution.

The first step in substituting one yarn for another is to look for a yarn of similar fiber composition that has approximately the same weight and recommended gauge as the yarn listed in the pattern. By this, I mean if the yarn used in the pattern is worsted weight (size 4), it’s best to find another worsted weight yarn to use as the substitute. If you are purchasing from a local yarn shop, the staff may help you find a substitute. If shopping online, Yarnsub.com is a helpful website that can be used to guide your initial search. Another resource is Ravelry – if the pattern is available in the Patterns database, you can look at others’ projects to see what yarns have been used. Regardless, once you pick your substitute yarn – you’ll need to swatch to find your gauge before you cast on and begin knitting the pattern.

Question: “I’m not getting the same gauge with my substituted yarn as the gauge stated in the pattern – what do I do now?

Here are some options to consider:

  1. Change needle size and reknit the swatch to see if you can match the gauge. If you are getting more stitches than the stated gauge – go up one or two needle sizes. If you are getting fewer stitches than the stated gauge – go down one or two needle sizes. If you succeed in matching gauge with the change in needles and you like the fabric you are producing, then simply follow your pattern and knit with the size needle that helps you get gauge.
  2. If you still can’t get gauge after changing needle sizes, but you like the fabric you are getting, calculate the number of stitches you need to cast-on to match your chest measurement and check the pattern to see if there is a size that uses the same number of stitches. You may still need to make adjustments in shaping if your row gauge is different from the pattern.
  3. Use the pattern as a guide only – use the schematic plus any adjustments you need to make and then determine the stitch counts and rows needed to make the garment with your own gauge. (A good reference for this is Knitting Pattern Essentials by Sally Melville)

Here’s the next issue for substituting one yarn for another: Does the substitute have the same weight and yardage as the original yarn? If it does – you are in luck and can simply buy the same amount of yarn as what is given in the pattern for the size of the garment you want to knit. (Remember to buy an extra one for swatching.) However, in most cases there is a difference in yardage and/or weight between the substitute and the original yarn – which leads to the question: “How much of my substitute yarn do I need? This brings us back to the basic math I covered in my previous post: “To determine the number of skeins, balls or hanks of yarn you need: Divide the number of yards by the number of yards in the skein. Or divide the total number of grams by the number of grams of the skein.  Remember that you will want one extra skein for swatching. “

Related Post

How to Knit a Helpful Swatch – Part 2 Stitch PatternsHow to Knit a Helpful Swatch – Part 2 Stitch Patterns

In my previous post, I discussed how to make a preliminary swatch to select the size needle that gives you a fabric that you like and then how to knit a gauge swatch. The gauge swatch is measured to give you your stitch gauge (stiches per inch) and your row gauge (rows per inch).

At this point, you might think you are ready to cast on and begin knitting your sweater – BUT….

Are you planning on using some type of ribbing for the bottom, cuffs and neckline of the garment? Are you planning on using a certain textured stitch pattern, a lace pattern or cables in your sweater? Will you be combining two or more stitch patterns in the body of the sweater? If the answer to any of these questions is “yes”, then you need to do more swatching.

Swatches with Borders: Have you ever knit something with a definite edge made by knitting either garter stitch or seed stitch and then found that the edges curl? The reason this happens is usually due to a difference in gauge between the stitch pattern used for the border and the stitch pattern used for the body. Thus, if you are knitting piece with a border that is different than the body of the piece, knitting a swatch with the borders on it provides you with an opportunity to make adjustments to minimize or eliminate the problem.  Suzanne Bryan has a nice video on this that you may find helpful, here’s the link:

Short Rows in Garter or Seed Stitch Border

Note: I don’t recommend using garter stitch borders on gauge swatches even though others do. The border tends to distort the swatch and may affect the accuracy of your measurements.

Swatches of Ribbing: Ribbing by nature tends to “pull in”. Which means that 30 stitches of ribbing will have a smaller width than 30 stitches of stockinette stitch. How much of a difference can be quite significant and affect the way the garment fits around the hips and neck as well as around the wrists on a long sleeve. Also, some knitters find that their ribbing stitches appear larger than their stockinette stitches due to changes in tension. One solution for this is to use a smaller needle when ribbing – but if you do that you may need to have more stitches to get the right width of fabric for a proper fit. Knitting a swatch with your selected ribbing pattern followed by a transition to the stitch being used for the body of the sweater will provide you with the information you need to decide what you want to do. You might want to knit separate swatches with different ribbing patterns to select which ribbing you prefer to use in your garment. (You don’t have to use the same ribbing that the designer did for the pattern if you don’t want to…just saying.)

Swatches of Stitch Patterns:

In this post, stitch patterns refer to textured pattern stitches, lace patterns, cable patterns, etc. Basically any grouping of stitches that combine to make a pattern from the variations in stitches used.

I think making a swatch of the stitch patterns used in a written pattern provides a great deal of useful information about how the finished garment will look and feel – and fit! It’s also good practice before doing it as part of your finished item.

Keep in mind that most written patterns only give gauge in stockinette stitch and while that tells you what the designer’s gauge is – it does not tell you how the gauge changes in the stitch pattern(s) used in knitting the garment. If you find a written pattern that states the gauge of the stitch pattern – great. But does your gauge match that? Swatching is the only way you will know.

If you are only using one stitch pattern, then knitting a swatch with two or more pattern repeats will help you figure out how the pattern affects the width and length of the garment and what adjustment you might need to make to obtain the correct size of garment you want. If you combine it with your ribbing, you will see how the ribbing affects the transition to the main fabric of the garment.

If you are combining more than one stitch pattern within the main fabric of a garment, I recommend doing individual swatches for each stitch pattern to use as a gauge swatches.

Then to see what happens when the stitch patterns are combined,  you should do a swatch large enough to include all of the stitch patterns used in the order you plan to use them. This may end up being a very large swatch – even enough stitches for the back of your garment. This type of swatch will provide you with a lot of helpful information and give you insight into what adjustments you might need to make for a great fitting garment.  More on this in a later post.

FO: Basic Anklets — Cuff DownFO: Basic Anklets — Cuff Down

After doing two pairs of the “Fancy Feet” Anklets, I came to the following conclusions:
1) I really, really do not like to knit socks of any type toe-up. (I know that may shock those of you that swear toe-up is the only way to go — but there it is. I just don’t like to knit ’em that way.
2) I don’t like the repeating short rows that make the heel on this pattern. I don’t care for it’s depth or it’s shape.
3) I prefer using the German Short Row method over the “Wrap and Turn” method.

As knitters, we do have the right to our preferences. These are some of mine.

That said, I got out my needles and some leftover sock yarn and started working on a basic anklet pattern, cuff down. I have now finished my first pair and my notes are a bit sketchy — so I will need to knit a couple more pairs before I put out my basic pattern. But here a couple of pictures of the completed anklets:

Details:
Yarn: Leftover Serendipity yarn in colorway Amethyst
Needles: US 2 (2.50 mm) circulars, 48″
Magic Loop method. Pattern has a basic rib cuff and a short-row heel. Knit in stockinette stitch.

You will note the pooling on this yarn. I wrote about how this variegated yarn pools depending on the size of needles and the number of stitches back in 2010. If you’re interested here’s the link: A Study of Pooling in a Variegated Sock Yarn

WIP: Teddy Bear for GrandsonWIP: Teddy Bear for Grandson

I think every child should have a teddy bear to love, so I am knitting my baby grandson a teddy bear. The pattern is from “Knitted Toys” by Debbie Bliss. When completed, this will be about 16-19 inches — which is a good size for a teddy bear.


I initially started this project using Peaches & Cream cotton worsted yarn in teal blue. I knitted up the first leg and started on the second one — and then decided I didn’t like the way the yarn was knitting up and I also didn’t like the color for the teddy bear. So, I switched yarns and colors and started over.

The yarn I choose is Knit Picks Shine Sport yarn in Willow colorway. This first photo is of the yarn and the beginning of the right leg.

I have knitted both legs at this point and plan to work on the body tonight while watching the Olympics. I have been using right and left slanted increases and decreases to help make the shaping more defined. [One of the things that I have learned while doing the Master Knitter Level I swatches with different increases.]