 # What Is Yarn Count (Numbering System)?

## Definition of Yarn Numbers (Counts)

A Count is a numerical value, which express the coarseness or fineness (diameter) of the yarn and also indicates the relationship between length and weight (the mass per unit length or the length per unit mass) of that yarn. Therefore, the concept of yarn count has been introduced which specifies a certain ratio of length to weight.

## Types of Yarn Count:

• Direct Count
• Indirect Count

## Direct Count System

The weight of a fixed length of yarn is determined. The weight per unit length is the yarn count! The common features of all direct count systems are the length of yarn is fixed and the weight of yarn varies according to its fineness.

The following formula is used to calculate the yarn count:

N =W xI/L

Where,
N = Yarn count or numbering system
W = Weight of the sample at the official regain in the unit of the system
L = Length of the sample

Direct Numbering System – Tex, Denier, Militex, DeciTex, KiloTex, Jute

## Indirect Count System

The length of a fixed weight of yarn is measured. The length per unit weight is the yarn count! The common features of all indirect count systems are the weight of yarn is fixed and the length of yam varies according to its fineness.

The following formula is used to calculate the yarn count:

N = LXw /W x I

Where,

N = Yarn count or numbering system
W (Capital = Weight of the sample at the official regain in the unit of the system
L = Length of the sample
w (small) = Unit of weight of the sample.
I = Unit of length of the sample.

Indirect Numbering System English cotton count, Metric count, Woollen count (YSW), Woollen count (Dewsbury), Worsted count NK, Linen count, NL.