**Introduction:**

Sewing thread is a ply yarn. Ply yarns are produced by twisting two or more singles yarns together. This increases the strength of the yarn. The singles yarns may be of equal or different count and they may be twisted together in one or several stages. Yarns of the different counts are twisted together in fancy yarns, for instance. Length Calculation of Cone is very important to the professionals.

Sewing thread consumption refers to how much thread need to for making cloth. To determine sewing thread consumption, there’s a standard formula. A unit length of seam depends on the following factors for the sewing thread consumption:

- Classes of stitch
- Stitches per inches (SPI)
- Fabric thickness of the seam
- Thread tension
- Sewing thread count

**Length Calculation of a Sewing Thread Cone**

If you want to calculate the sewing thread of a cone then you have to must read this article “Different Formula for Yarn Count Calculation”.

**Length calculation of a cone of sewing thread :**

Example1: What length of yarn is contained in 95 gm of yarn of Ne 50/2?

**Solution:**

We know that,

……………………………………………L × w

Ne (Indirect system) = ………………………………..

……………………………………………W × l

………………….Ne × l × W

Or, L = ……………………………. _________(1)

………………………..W

Here,

Ne = 50/2 = 25

W = 95 gm

W = 1 lb = 453.6 gm

l = 840 yds = 840 × 0.91 m

From Equation …..(1)

L = (25 × 840 × 0.91 × 95)/ 453

L = 4002.31 m (ANS)

From the above calculation, the formula can be developed to calculate the length of sewing thread from a cone as follows:

**For Ne (Indirect System): **

L = (NR x W) x (840 x 0.9144) / 453.6

Or, L =(NR x W) x 1.6933

Where,

L = Length of the yarn in meter (m)

NR =Resultant or ply count of yarn in Ne system

W =Weight Of the Yarn in gram(gm)

1.6933=Constant value (Only for Ne system)

**For Nm (Direct system):**

L= (NR x W)x 1000 / 1000

Or, L=(NR x W)

Where,

L = Length of the yarn in meter (m)

NR = Resultant or ply count of yarn

W = Weight of the yarn in gram (gm)

Author of this Article:S. M. Hossen UzzalProduction Officer Monno Fabrics Ltd., Manikgonj Email:[email protected]