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Home » Free Crochet Patterns » Understanding Yarn Weights

Understanding Yarn Weights

Updated September 7, 2020 by Krista Cagle Leave a Comment Advertiser Disclosure
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I get a lot of questions about yarn weights in my patterns but more specifically how to use a yarn that is in US terms vs UK terms vs Australian terms.

This US to UK yarn weights vs Australia yarn weight comparison chart below will help you worked out yarn sizes when you don’t have access to the yarn the pattern calls for.

Whether you are crocheting or knitting this yarn size chart can help!

Yarn weights go by so many names, it can be really difficult to keep track of what’s what. Use the yarn types chart below as a guide to determine what yarn weight needs to be used according to what the pattern asks for.

Yarn Weight Conversion Chart

Below in the yarn weight chart, the standard US yarn weight terms are side-by-side with their equivalent United Kingdom and Australian terms.

USA UKAustralia
#0 – Lace / Fingering1 ply2 ply
#1 – Super Fine / Sock / Fingering2 ply3 ply
#2 – Fine / Baby3 ply3 ply
#2 – Sport4 ply5 ply
#3 – DK / Light WorstedDK8 ply
#4 – WorstedAran10 ply
#5 – BulkyChunky12 ply
#6 – Super BulkySuper Chunky14 ply
#7 – Jumbo / Rovingn/an/a

Crochet Patterns by Yarn Weight

All of our free crochet patterns are broken down by these same weight classifications. You can click on each weight name, and see all the free patterns we’ve created for that particular yarn weight class.

Yarn Weight

Weight 1 - Super Fine Weight 3 - Light Weight 4 - Medium Weight 5 - Bulky Weight 6 - Super Bulky Weight 7 - Jumbo

Yarn Weight Descriptions

You may be wondering why there are so many yarn weight names to begin with. A blanket needs a different weight (sometimes referred to as it’s size) than appliquéing, and these different yarn sizes account for those differences.

Weight #0 or Lace includes yarn type fingering 10-count crochet thread. This weight of yarn is usually crocheted using the US hook size of 6/7/8 (steel) and B-1 of regular. The metric equivalent is 1.6-1.4mm for steel and the regular metric hook size of 2.25mm.


Weight #1 or Super Fine includes yarn types of sock, fingering and baby. This weight of yarn is usually crocheted using the US hook sizes of B-1 to E-4 and the metric sizes of 2.25 – 3.5 mm.


Weight #2 or Fine includes yarn types of sport and baby. This weight of yarn is usually crocheted using the US hook sizes of E-4 to 7 and the metric sizes of 3.5 – 4.5 mm.


Weight #3 or Light yarn includes the yarn types of DK and light worsted. This weight of yarn is usually crocheted using the US hook sizes of 7 to I-9 and the metric sizes of 4.5 – 5.5 mm


Weight #4 or Medium yarn includes the yarn types of worsted, afghan and aran. This weight of yarn is usually crocheted using the US hook sizes of I-9 to K-10 1/2 and the metric sizes of 5.5 – 6.5 mm.


Weight #5 or Bulky yarn includes the yarn types of chunky, craft and rug. This weight of yarn is usually crocheted using the US hook sizes of K-10.5 to M-13 and the metric sizes of 6.5 to 9 mm.


Weight #6 or Super Bulky includes the yarn types of super bulky and roving. This weight of yarn is usually crocheted using the US hook sizes of M-13 to Q and the metric sizes of 9 to 15 mm.


Weight #7 or Jumbo includes the yarn types of jumbo and roving. This weight of yarn is usually crocheted using the US hook sizes of Q (and larger) and the metric sizes 15 mm and up.

Yarn Weight Comparision Chart

Filed Under: Beginner Guides, Crochet Tutorials, Free Crochet Patterns

Happy Crafting!

Krista

You can follow along with me and Easy Crochet on Pinterest (I pin daily), Facebook and Instagram. We are always posting about our lastest creations. Thanks for stopping by!

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Hi! I'm Krista.

I love crocheting, every dog I've ever met, and working at home in comfy yoga pants. Grab a cup of coffee and let's get to work on your next project together!

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