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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Mirrored Cables – Front Cross & Back Cross CablesMirrored Cables – Front Cross & Back Cross Cables

May 13, 2010| Lindy| 0 Comment| 11:03 am

Front Cross and Back Cross Cable Stitches are mirror images of each other. The Front Cross cable twists to the left, while the Back Cross twists to the right. Both cables are done over four stitches.

In the sample – I have knitted a swatch with 3 Front Cross Cables and 3 Back Cross Cables to demonstrate how they mirror each other and also to show how these two cables would look in a ribbing. Remember that cables are usually separated by a few purl stitches in most textured pattern designs. In this swatch, I separated the cables by 2 purl stitches on each side. (I also blocked this swatch and stretched it to separate the cables. If you were using these cables as a ribbing, you would not want to block your garment this way.)

The Front Cross Cable is often written in patterns as “C4F”. To knit this cable, you slip the first two stitches onto a cable needle and hold them in the front of your knitting while you knit the next two stitches. Then you knit the two stitches off the cable needle. This results in the cable twisting to the left.

Tension can be an issue here, as many knitters tend to stretch the last stitch of the four a bit too much and end up with a looser stitch on the left edge of the needle. If you look closely at the left edge of the cable in the picture above, you will see that I do have looser stitches on the left edge.

Montse Stanley, in the “Knitters Handbook”, suggests knitting through the back of this stitch, rather than then front will tighten it up. You must remember to purl through the back loop again on the next row or you will have a twisted stitch if you do this, however.

The Back Cross Cable is often written in patterns as “C4B”. To knit this cable, you slip the first two stitches onto a cable needle and hold them in the back of your knitting while you knit the next two stitches. Then you knit the two stitches of the cable needle. This results in the cable twisting to the right. The same tension issues occur with this cable as with the Front Cross Cable.

In my swatch, I have varied the number of rows between cable stitch repeats to demonstrate how the appearance of the cables changes with the number of rows. The first two cables are based upon a four row repeat (meaning that the cable was done on the fourth row) and the last two cables are based upon a six row repeat.

These two cable patterns are very versatile – uses include: all-over cable patterning in a sweater (the popular “baby cable” sweaters found in stores today), a border for another textured pattern in an Aran style sweater, a decorative ribbing for a pullover sweater, the patterning found in my Cable Rib socks. I’m certain you can find many more examples as you look through sweater and sock patterns.

Knit 1 Below and the Bee Stitch — New VideoKnit 1 Below and the Bee Stitch — New Video

July 21, 2023| LindyBeir| 0 Comment| 11:55 am

I have uploaded a new video to my YouTube Channel. I made a post about Bee Stitch several years ago and it is one of my most viewed posts. Since it seems to be a subject that knitters search for, I have created a short video demonstration on how to do the “knit 1 below” technique and knit the Bee Stitch Pattern.

I have a written pattern available on the Bee Stitch in my Stitch Library as well. This pattern makes a lovely, fluffy scarf and works well for a hat when knit in the round. My “Bee Stitch Beret” pattern is available for download here or in my Ravelry designs: Beret in Bee Stitch.

Happy Knitting!

#knittingwithLinda_omaha @knittingwithlinda_omaha #beestitch #knit1below

FO: Plain Vanilla Socks in Serenity Sock YarnFO: Plain Vanilla Socks in Serenity Sock Yarn

June 14, 2010| Lindy| 0 Comments| 2:39 pm

I have finished my Plain Vanilla Socks knitted in Serenity Sock Yarn (Premier yarns), colorway Amethyst. This is the yarn that I wrote about in a previous post: “A Study of Pooling in a Variegated Sock Yarn”. As I discovered in my study of how this yarn pools, by using 54 stitches on size US 2 (2.75mm) needles, I got a “striping” effect as the yarn pooled. You can see the result in the picture above.

Serenity Sock Yarn is a variegated yarn with color changes that are fairly short and don’t necessarily produce stripes when the number of stitches increases. The yarn itself has a nice soft feel to it and it knits up nicely, but I did experience a tendency of the yarn to split at times. The yarn is 50% Merino Wool, 25% Bamboo and 25% Nylon and has sufficient stretch for a well-fitting pair of socks. Anyone planning on using this yarn should definitely knit a swatch with the number of stitches they are planning to use for their socks to see if it knits up in a way that they like.

There was a pattern printed on the inner label that called for a gauge of 9 spi on US 2 (2.75mm) needles. The pattern is based upon 64 stitches. Now, I got an spi of 6.25 on US 2 needles, which is a significant difference and I cannot speak to how it would pool at the stated gauge of 9 spi. I know that I knit more loosely and guess that in order to obtain 9 spi, I would have to use US 0 (2.25 mm) or US 00 (1.75 mm). I really prefer to knit socks on a little bigger needles. These socks were for me to wear around the house and they fit my feet perfectly.

As for the pattern used for these socks — I really didn’t use one. I knit a 3 X 1 ribbing for 1.5 inches, then switched to stockinette stitch and knit until the cuff measured 6.5 inches. I did a short row or mitered heel and then knit the foot and toe in stockinette and grafted the toe when I had 9 stitches remaining on each side of the sock. I used the Magic Loop method and knit the socks two at a time.