Yarn Conversion Chart

Red Heart With Love YarnUse this yarn conversion chart only as a guide and I suggest you test with a gauge swatch/tension square for more accurate results.

This yarn conversion chart is also useful if you have a pattern that lists a yarn that has a different country measurement scale and you need to convert yarn from one country to another.

This chart will also help you become familiar with the different names used between countries for the same types of yarn.

Yarn Conversion Chart

US Yarn Description UK Yarn Description AUS/NZ Wool Description Recommended Hook Size Gauge Range to 4 inches (with a single crochet)
Category 1:Superfine

Types of Yarn:

Baby weight,

Fingering weight,

Sock weight

Baby,2-3 ply Baby,2-3 ply US: B/1 – E/4 

UK: 13 – 9 or 10


AUS/NZ and Metric:

2.25 – 3.5mm

21 – 32 sts
Category 2:Fine


Types of Yarn:

Baby weight,

Sport weight

Baby,3 ply Baby,3 ply US: E/4 – 7 

UK: 9 or 10 – 7


AUS/NZ and Metric:

3.5 – 4.5mm

16 – 20 sts
Category 3:Light

Sports weight


Types of Yarn:

Double Knitting(DK),

Light worsted

Baby,4 – 5 ply,

8 ply

Baby,4 – 5 ply

8 ply

US: 7 – I9 

UK: 7 – 5


AUS/NZ and Metric:

4.5 – 5.5mm

12 – 17 sts
Category 4:Medium


Types of Yarn:




Double Knitting weight(DK),10 ply Double Knitting weight (DK),10 ply US: I9 – K/10½ 

UK: 5 – 3


AUS/NZ and Metric:

5.5 – 6.5mm

11 – 14 sts
Category 5:Bulky


Types of Yarn:

Chunky ,



Aran,Double Knitting weight(DK),

10 ply

Aran,10 ply US: K/10½ – M 

UK: 3 – 00


AUS/NZ and Metric:

6.5 – 9.0mm

8 – 11 sts
Category 6:Super Bulky

Types of Yarn:

Super Chunky,


Chunky,Triple Knitting weight (TK),

12 ply

12 ply US: M/N13 upwards 

UK: 00 and upwards


AUS/NZ and Metric:

9mm and upwards

5 – 9 sts

I hope this is helpful to you. If you can see that something should be added to this yarn conversion chart then leave your suggestions below, they will be reviewed and adjustments will be made if accurate.

Enjoy making your projects!

All the best,


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About Paula

I'm the Crochet Designer, Teacher & Video Producer of Crochet Hooks You.

I taught myself how to crochet when I was a young girl and quickly picked up how to crochet the granny square and got hooked. Read More.


  1. Sharon says:

    Thank you for such a comprehensive conversion chart, living in Australia and as you know yarns being different to US it can be difficult to get the conversion right. I think I will have a lot less trouble now I have you chart, so many times it has been complete guesswork. Again thank you

    • Paula says:

      I’m really glad this was of use to you, Sharon.

  2. June says:

    Hi Sharon

    Like Paula, I live in Australia. I use a lot of US crochet patterns so this conversion chart is an absolute lifesaver – thank you, you have saved me much heartache and frustration with future projects. Yay!!

    Be fabulous

  3. June Watson says:

    Thank you for the conversion chart. It is if such great help. I live in North Cyprus, all the wool and patterns here are I’m Turkish, as least I will know what to buy now. Thanks again. June Watson

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