Handy knitting calculators and charts

Knitting isn't all about maths but sometimes you'll need to be able to convert between yards and metres, or if you're substituting yarn, calculate how much yarn you'll need for a project! To make it easier, we've created special calculators to do the work for you! Our calculators will help you to:

- Convert between mm and inches to check a tension square, sizing of a garment or motif
- Convert between yards and metres to help calculate the amount of yarn you need for a garment
- Convert between grams and ounces to measure how much yarn you have left (or to compare brands)

To convert from one to the other, just input a value and the conversion will appear in the empty box.

Convert between mm and inches

mm
inches
Convert between yards and metres

yards
metres
Convert between grams and ounces

grams
ounces

Quick links

My pattern requires x amount of yardage
The yarn I want to use has x amount of yardage. How many balls do I need to make my garment?
How many stitches do I need to knit?
How many rows do I need to knit?
Roughly how much yarn will I need for a particular garment?
Country yarn weight conversion and needle requirements


Our yardage calculator will enable you to work out how many balls of yarn you will need based on the yardage of each ball, and you can either calculate by the total yardage required, or the yardage from each ball:

Number of balls    balls
Yardage of one ball    yards
  

The yarn I want to use has x amount of yardage. How many balls do I need to make my garment?

Total pattern yardage required    yards
Yardage of one ball    yards
  

This stitch and row calculator will help you work out how many stitches and rows you need to knit per inch:

Your stitch count    stitches per inch
Width required    inches
  

How many rows do I need to knit?

Your rows per inch    rows per inch
Length required    inches
  

Our yarn weight calculator will work out how many balls of yarn a pattern requires by weight:

Weight required    grams
Weight of one ball    grams
  

If you're shopping a sale, or making a speedy purchase, this chart gives you a rough idea of how much yarn you need by weight and yardage for different projects:

Yarn Weight Category Tyles of Yarn in Category Stitches per Inch Yards Needed for a Hat Yards Needed for a Scarf Yards Needed for an Adult Sweater
1 Superfine sock, fingering, 1-3 ply, baby 7 to 8 300 to 375 350 1,500 to 3,200
2 Fine sport, baby 6 to 7 250 to 350 300 1,200 to 2,500
3 Light DK, light worsted 5 to 6 200 to 300 250 1,000 to 2,000
4 Medium worsted, aran 4 to 5 150 to 250 200 800 to 1,500
5 Bulky/Chunky chunky, bulky, craft, rug 3 to 4 125 to 200 150 600 to 1,200
6 Super bulky/chunky bulky, chunky, roving 1.5 to 3 75 to 125 125 400 to 800

Country yarn weight conversion and needle requirements

USA UK Australia Suggested needle (mm)
Laceweight 1 ply 2 ply 1.5–2.25 mm
Fingering 2 ply 3 ply 2.25– 3 mm
Sock 3 ply 3 ply 2.25— 3.25 mm
Sport 4 ply 5 ply 3.25— 3.75 mm
DK/Light Worsted DK 8 ply 3.75— 4.5 mm
Worsted Aran 10 ply 4.5— 5.5 mm
Bulky Chunky 12 ply 5.5– 8 mm
Super Bulky Super Chunky 14 ply 8 mm and up




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