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Yarn Weight, Knitting Needle and Crochet Hook Conversion Charts for USA, UK and Australia

Yarn Weight, Knitting Needle and Crochet Hook Conversion Charts for USA, UK and Australia

Yarn Weight, Knitting Needle and Crochet Hook Conversion Charts for USA, UK and Australia
by Kristin Omdahl

This is an often talked about and often confusing subject matter. I get asked all the time about it. Here is a video explaining some of the myths and truths about yarn weights. Then below that, please find charts comparing metric, US and UK conversions for yarn weights, knitting needle sizes and crochet hook sizes. Pin the charts to your Pinterest boards for safe keeping! This information is invaluable when yarn shopping or substituting yarn in any pattern or project.

Yarn Weight

Yarn weight refers to the thickness of the thread, not the weight of the ball or the weight of the thread. Each fiber has a different density. It is possible for a thinner yarn to weigh more than a thicker one. 

KO Yarn Weight Conversion Chart.jpg

*Note: the suggested crochet hook and knitting needle suggested size range in the following charts does not reflect using larger sizes for achieving drapey gauge for lace. This suggested range is for making a standard fabric of rows of stockinette stitch (for knitting) or rows of double crochet (for crochet).

Yarn Ply

Spinners pull fiber into single, long threads. These threads are often plied together to make up a yarn’s desired weight (thickness). This also adds strength to the yarn. Traditionally the names of yarns were specifically describing the number of plies of thread. Currently, many companies spin yarn at various weights so a 3ply yarn could be much thicker due to the fact that each ply could be thicker than they once uniformly were.

Knitting Needles

Knitting needles come in straight, circular and double pointed categories. And each type of needles comes in a variety of sizes. Those sizes can be measured in metric or by names depending on what part of the world you live in. This chart compares each metric size to its US and UK names for your convenience.

KO Knitting Needle Conversion Chart.jpg

Crochet Hooks

Crochet hooks come in a variety of styles and materials including plastic/resin, aluminum, and wood/bamboo. Then each type of crochet hook comes in a variety of sizes. These sizes are broken down into two categories: regular standard hooks (ranging in size from 2mm - 25mm) and steel crochet hooks (ranging in size from 0.6mm to 1.95mm). The sizes can be measured in metric or by names depending on what part of the world you live in. These charts compare each metric size to its US and UK names for your convenience.

KO Steel Crochet Hook Conversion Chart.jpg
KO Crochet Hook Conversion Chart.jpg

Kristin Omdahl Yarns

The family of Kristin Omdahl Yarns is 100% thoughtfully sourced and 100% gorgeous. Compare each by weight, yardage, fiber content side by side in the chart below. Shop them all here in the Kristin Omdahl Yarn Store.

KOY Yarns by Weight Chart.jpg

 

 

 

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