How to Knit a Helpful Swatch – Part 4 Swatching to Estimate Yardage Needed

August 24, 2020| LindyBeir| 0 Comment | 8:00 am

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I have covered the basics of how to make a Gauge Swatch and calculate your stitch and row gauge in my previous three posts. Today’s topic will cover some basic math to help you estimate the yardage that you need using your yarn, your needles, and your gauge to make a sweater.

Let’s say you want to make a sweater using yarn from your stash and you need to know if you have enough to make it. To make this estimate, you need the measurements for the sweater you want to make. If you are using a pattern, the finished measurements should be stated within the pattern – ideally on a schematic. Some patterns may only state the desired measurements within the text of the pattern and you may have to read through to find them. If you are making the sweater without using a pattern – you would use the measurements of the individual who will be wearing the sweater.

The image below shows a schematic for the back of a sweater of a drop sleeve sweater. The back is 28 inches long from the hem to the neck and it is 20 inches wide. Both the front and the back of this type of sweater are essentially rectangles.

The schematic for the sleeves of this sweater are shown below.

At this point, you have the numbers you need to calculate the number of square inches of fabric that you need to make for this sweater. For the front and back, multiply the length by the width on the schematic and then multiply that number by 2. Using the numbers from my example above:

20 * 28 = 560 560*2 = 1120 square inches for front and back.

The sleeve is a trapezoid shape. The formula for the area of a trapezoid is:

[(b1+b2) * h] / 2

Where b1 is the width at the bottom of the sleeve(8”) and b2 is the width at the top of the sleeve(15”) and h is the length of the sleeve(18”). Using the numbers from the sleeve schematic, the area for one sleeve is 207 square inches. Since you need two sleeves, you then need to multiply the area of the sleeve by two. (414 square inches)

Now, here’s a short cut – if you place your sleeves next to each other so that the tops of the sleeves are parallel – you have a parallelogram. To get the area of this parallelogram you simply multiple the width(15”+ 8” = 23”) by the length(18”). Try it – you’ll get the same number as above.

Add the square inches for the front and back to the square inches for the sleeves and you have the total number of square inches of fabric in the sweater. Now that you know the total number of square inches of fabric you need, you will need to use the yardage and weight information of the yarn you want to use to estimate how many skeins or balls of yarn your sweater requires. The yardage per weight of the yarn will be found on the yarn label – see image below:

You will use the yards per gram value in the estimate for total yardage. Now you need to knit a swatch. The swatch should be in the same stitch pattern that you plan to use for the body of your sweater. This swatch does not need to be the same size as your gauge swatch, but it should be wide enough and long enough to get an accurate weight, length and width measurement. After you knit this swatch, you will measure its weight using a scale that measures to the nearest tenth (0.1) of a gram. Next measure the length and width of the swatch and multiply these values together. This gives you the number of square inches in your swatch. Now divide the number of grams by the number of square inches.(Do not round). You now know what 1 square inch of your yarn weighs. This is the number you need to calculate how much yardage you need for your sweater.

Example: My swatch measures 3.5 inches by 4.5 inches, which gives me 15.75 square inches. The swatch weighs 9.6 g. Dividing 9.6 by 15.76 gives me 0.622 g/square inch.

Here’s the final set of calculations:

Take the total number of square inches of fabric and multiply it by the number of grams per square inch. This gives you the total weight in grams for your sweater.

Total Number of Square Inches * grams/inch² = Total grams of fabric

Total Grams/Square Inches = (1120 + 414) * 0.622 = 954.148 g

Now take the yards per gram value from the yarn label. (For example 218 yds/100grams). Divide the yds by the grams to get the number of yards in 1 gram of yarn. (For example: 218yards/100grams = 2.18 yards per gram.) Multiply the total number of grams of fabric by the number of yards per gram to get the total yardage for the sweater. Using the numbers from the examples above:

Yards per gram = 2.18 yds/g

Total Yards of Yarn = 954.148 * 2.18 = 2080 yds

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. (In my example, I would need 9.5 skeins, so I would want 11 skeins with one extra for swatching)

What to do if you don’t have the yarn label

To determine how many yards of yarn you have when you do not have the yarn label or any information, simply measure out 10 yards of your yarn and weigh it. Divide the weight by 10 and you have the weight for 1 yard of yarn. Now weigh the skeins/hanks of yarn and multiply by the weight of 1 yard. This will give you the number of yards for each skein/hank.

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Selecting Needles Part 2: Needle Tips and Different lengths for Different Techniques and TasksSelecting Needles Part 2: Needle Tips and Different lengths for Different Techniques and Tasks

July 18, 2022| LindyBeir| 0 Comment| 8:48 am

In my last post on knitting needles, I discussed the various options for needle materials and types of needles. Today, I will go over needle tips and cable lengths for circular needles.

Needle Tips:

Needle tips vary in both length and sharpness. The sharpness of your needle tip can be an important factor in how your knitted stitches turn out. For instance, it is easier to do knit lace patterns where you are doing increases and decrease with a needle tip that is fairly sharp. A sharp point is helpful when you are attempting to insert your needle into two or more stitches to make a decrease. Sharp points also work well for knitting cables. If you are using a yarn that tends to split when being knit, a blunter needle tip may be a better option than a very sharp one.

Now, if you are a knitter that uses your finger to push the left needle tip while transferring a stitch to the right needle – you probably won’t enjoy knitting with very sharp pointed needles. (Your finger will get quite sore as you knit. So, if you decide to use a needle with a sharp tip, you may need to alter your technique to avoid this problem.) The sharpness of knitting needle tips varies from brand to brand. In my experience, my Knit Picks needles have a sharp tip, while my Addi needles are less sharp. Likewise, the sharpness of needle tips can vary with different needle materials. I find my new Hiya Hiya interchangeable tips to be sharper than my Knit Picks needles. I have also purchased a few ChiaGoo needles and they have sharp tips. I actually poked a hole in my index finger while knitting with the ChiaGoo’s.

Needle and Cable Lengths:

The length of a circular knitting needle is measured from tip to tip – and includes both the needle and the cable. This is true of fixed and interchangeable needles. Most fixed circular needles have tips that are about 5 inches long. Interchangeable needle tips can be purchased in lengths from 2 ¾ inches to 5 inches. The matching cables come in lengths that result in the total length of the needle – i.e., if you buy a 24-inch cable for a 2 ¾ inch tip, the cable is actually 18.5 inches – but when you attach the needle tips the total length will be 24 inches. The length of the needle tips is a matter of preference, and you may need to try different lengths to determine what works best for you.

For general purpose knitting, a 24-inch circular needle will usually handle enough stitches for a project. I have several 24-inch cables in my collection and use them frequently. Shorter length needles work better for projects like hats, mittens, and socks. I use 16-inch circulars to knit hats most of the time. Some knitters love using 9-inch circulars for knitting socks – but I have not tried them.

Longer cables are good for projects with a large number of stitches (100+)– like shawls and large size sweaters. Longer cables are also needed when using the Magic Loop method for small diameter knitting. When using Magic Loop, I use either a 40-inch or a 60-inch cable. You can purchase cables for longer lengths from 30 inches to 60 inches.

If you prefer to use the Two Circular Needle method for small diameter knitting, 24-inch circulars work well. Some knitters like to use one needle that is longer than the other when using this method as it helps them know which needle to use for each side of the knitted item. Again, it is a matter of personal preference.

DPN’s and new options

I have a few DPN’s but I rarely use them. This is a matter of preference. Some knitters are devoted DPN users and don’t like to use magic loop or two circulars for small diameter knitting. Technically, circular knitting needles are double pointed needles. But I usually think of DPN’s as a set of double pointed, straight needles with either 4 or 5 needles. The information above regarding materials and sharpness of tips apply to DPNs also.

New options for DPNs are now available. These needles have a short flexible cable in the middle. They are used in the same manner as straight DPN’s. These include:

Hiya Hiya Flyers https://hiyahiyanorthamerica.shptron.com/p/8-0-us-2mm-bamboo-hiyahiya-flyers-pack-of-3?pp=8

Addi Flex Flips https://www.jimmybeanswool.com/secure-html/productExtraImages/80000/83483Large_5e89.jpg

I hope you found this information helpful. If you did please give this post a “Like”.

A Study of Pooling in a Variegated Sock YarnA Study of Pooling in a Variegated Sock Yarn

May 5, 2010| Lindy| 0 Comments| 12:38 pm

Several days ago, I decided to knit a pair of plain vanilla socks using Serenity Sock Weight Yarn (Premier Yarns) in the colorway Amethyst. This was a yarn I had purchased at my local Hobby Lobby and had been sitting in my sock yarn stash for a few months. In the skein, the yarn appears to be a mix of greys and purples, and I thought it would result in a striping of the socks. The label does not indicate that the yarn is “self-striping”, but the picture on the label shows a sock with an interesting variation of stripes.

Since I had never knit with this yarn, I knit a circular swatch to determine needle size and gauge before starting on my socks – and this is where my study in “Pooling” began. I started with US 2 (2.75 mm) needles and cast on 64 stitches (which is what I would use for my socks with a gauge of 7 stitches per inch). As I worked on the swatch, I noticed that the yarn was not knitting up in the stripes the way I had anticipated – in fact, it seemed to be predominately purple on one side of the swatch and predominately grey on the other side.

Obviously, I had some “pooling “ going on. Pooling is an effect that occurs when a variegated yarn knits up in “pools” of color, rather than in stripes. Now, I wasn’t really sure I liked the effect – and my stitch gauge was 6.25 spi, rather than the 7 spi I wanted.

So, I decided to do a second swatch with fewer stitches, a smaller needle – and because I had read about pooling in a Rav thread, I also decided to knit from the outside of the skein instead of the inside. I cast on 52 stitches on size US 1.5 (2.50 mm) needles and knit away – and I got more striping – not even stripes, but definitely stripes on both sides of the swatch.

So, I took a picture of the two swatches and posted a comment on Ravlery under the thread, “Examples of Pooling Good & Bad”, stating what I had observed along with my assumption that the change was probably due to knitting from the outside of the skein – and completely ignoring the fact that I had changed the number of stitches in the swatch and this might also be contributing to the way the colors were knitting up.

I must admit, I did not anticipate much of a response to my comment in this thread. But I received several. It’s one of the things I love about Ravelry – fellow knitters are always willing to share and question things. Anyway – after reading the comments, I decided I needed to do a little more work before I could actually answer my fellow Ravelers’ questions.

Off I went to swatch again – this time I decided to start from the inside of the skein, use US 2 (2.75 mm) needles and begin by casting on 72 stitches. I knit approximately 1.5 inches, then purled and decreased the number of stitches to 64 stitches, knit another 1.5 inches, purled and decreased to 54 stitches and knit another 1.5 inches. Here’s a picture showing how the yarn pooled with different numbers of stitches.

So – in response to Robocass and Hypercycloid, who asked me if the difference might be due more to the difference in the number of stitches in my swatches: Clearly, the number of stitches used results in very different color patterning and it doesn’t really matter whether I knit from the inside or the outside of the skein.

Hypercycloid also asked about the length of each of the colors in the yarn. Hmm – I hadn’t thought about that, so I got out the measuring tape and discovered that each purple section of the yarn was approximately 19 inches, while the grey sections were approximately 12 inches. Not quite, but almost a 3 to 2 ratio. Statnerd suggested I count the number of grey stitches compared to the purple stitches in my wider swatch – I did and ended up with 27 stitches of grey to 37 stitches of purple. Again, this is close to a 3 to 2 ratio of purple to grey. All of you were correct in your observations that the colors shift around the circumference of the swatches – and due to the differences in the number of stitches, the colors stack up very differently for different numbers of stitches.

Zgma commented:

“It doesn’t look like a self-striping yarn to me. The striping you got in the top sample is a result of the colors pooling in a way that looks like stripes, not actual “self-striping”. When yarns are labeled self-striping, it is because the runs of color are large enough that for the project intended (as in, socks for self-striping sock yarn), the color will last for all the stitches in at least one round or row, usually more. When a particular color (for instance, the black in your sock samples) lasts for part of a row, but then in the next row the color occurs before or after it did in the previous row in such a manner that it looks like striping, it doesn’t mean that the yarn is self-striping – just that it is prone to pooling in a stripey way.”

Yep, you are right about that.

To each of those that took the time to comment — thanks! I learned a great deal about pooling and variegated yarns.

I did a little internet surfing on the subject, as well. I found two informative posts about Pooling — One from the Yarn Harlot and the other from Knitting Sutra.

So – I am not really sure if I like this particular yarn – but I have decided to proceed with using it to knit a pair of plain vanilla socks. I am going to use US 2 (2.75 mm) needles with a gauge of 6.25 spi and cast on 54 stitches (this should fit my foot). I’ll post pictures of the final result.

Cast On MethodsCast On Methods

February 17, 2021| LindyBeir| 0 Comment| 11:48 am

This is the first post about Cast Ons. There have been several books written about different cast on methods as well as many chapters in general knitting references and YouTube videos. What I know now as a long time, more experienced knitter is that there a lots and lots of different ways to accomplish the task of putting the first stitches on your needles so that you can begin to knit. But when I first started knitting, I only knew one way to cast on. That’s because, as I believe is the case for most beginners, I was only taught one way to cast on. And I suspect that my knitting teacher taught me that cast on because it was the method that she knew.

While visiting my older sister, I learned to knit from a woman who sold yarn kits and gave knitting lessons in her apartment. So, my first knitting project was a slipper pattern kit that came with the yarn, a set of needles and an easy beginner level pattern. I think I had maybe two lessons from her and I was off to knit on my own. My teacher taught me the “Knitted Cast On” method. I used this method for a long time before discovering another cast on method – the “Backwards Loop (or E-wrap)” cast on.

The first time I encountered the notion that there were other ways to cast on was when I was knitting my very first sweater and I ran into an issue and needed some help with my project. Now, I lived in a very small town and there weren’t many people who knew how to knit. My mother located a neighbor who did and was willing to help me, so I went over to her house with my sweater. The neighbor did help me get my problem fixed – but what I remember most clearly about this session was what she said about my cast on: “Oh, you cast on wrong.”

My 11 year old self didn’t comment on that statement, but I was doing a slow burn because “I DID Cast on the right way.” I had used the knitted cast on that I knew. A lot of time passed between this incident and my learning that there are many ways to accomplish the same thing in knitting. And – I am still learning different ways to cast on!

So, in this series of posts about cast ons, I will discuss the cast ons that I currently know how to do and when and with what projects I use them. Since it was the first one I learned, I’m starting with the Knitted Cast On.

The knitted cast on is an easy cast on to learn as a beginner. Essentially, you create your first stitch on your needle by making a slip knot, placing it on the needle and start the cast on by knitting a stitch through the loop using your other needle. Once you have the stitch on the right hand needle, you slip it back onto the left hand needle and tighten it up a little, then knit into that stitch and repeat the process until you have the desired number of stitches.

Where I use this cast on:

When I want a fairly firm , yet somewhat stretchy edge: project like scarves, some shawls, blankets
Casting on for underarm stitches or thumb gussets in gloves or mittens

Here’s a YouTube video on this cast on: Knitting Help – Knitted Cast On

Next Post: e-Wrap (Backwards Loop) and Cable Cast On Methods