# Frequent question: How do you measure WPI yarn?

Contents

## What does worsted 9 WPI mean?

4 – Worsted Weight Yarn

WPI: 9-11. 4-5 sts/inch.

## What is WPI in yarn weight?

Wraps per inch is commonly used by weavers, but it can be helpful for all yarn users to identify the weight of yarn if its label is missing. To measure yarn in wraps per inch (or WPI) you need a ruler, and something to wrap the yarn around that has a consistent circumference, like a pencil.

## What is 12 WPI yarn?

Measure the number of wraps per inch (2.5 cm). The number of wraps will act as a gauge to assess the thickness of unmarked yarn; for example 12 wraps per inch is 12 WPI, and is used to calculate how much yarn is required for various articles so that 12 WPI is equivalent to 8 ply (worsted weight, medium weight) yarn.

## What are the different sizes of yarn?

Yarn Weight (Thickness)

Yarn Weight US Needle Size Knitting Stitches Per Inch, in Stockinette Stitch
Fine or sport-weight 3–6 5–6
Light worsted or DK (double-knitting) 5–7 5–5 1/2
Medium- or worsted-weight, afghan, Aran 7–9 4–5
Bulky or chunky 10–11 3–3 1/2

## What ply is medium worsted weight yarn?

Worsted is sometimes known as 10 ply yarn, while DK is referred to as 8 ply.

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## How do you calculate WPI?

To calculate the wraps per inch (WPI), simply wrap the yarn around a pencil or knitting needles. Don’t wrap too tightly, just provide the normal slack you would if you were knitting. Wrap the yarn for approximately 3-4” along the pencil/needle. Use a ruler and count the number of wrap per inch.

## What is light weight yarn?

Light weight yarns, also known as DK and light worsted, are ideal for stitching a variety of projects including shawls, scarves, sweaters, baby items, and blankets in knitting, crocheting, and weaving.

## What is finger weight yarn?

Fingering weight yarn is a smaller diameter yarn that usually has 400–450 yards per 100 grams. Alternatively called “Sock Yarn” this is the most common weight used for making socks because of its light weight creating a fine texture”

## What is 3 ply yarn called?

International standard weights

USA UK Other names used,
1 or Super Fine 4 ply Fingering, Sock, Baby
2 or Fine Sport, Baby, 3-ply (obsolete American)
3 or Light DK (Double Knit) or 8 ply Light Worsted, DK
4 or Medium Worsted, Aran, Triple Knit (rare) Worsted, Afghan, Fisherman, 4-ply (obsolete American)