**Sewing Thread Consumption Formula with Example**

**Noor Ahmed Raaz**

B.Sc. in Apparel Manufacturing

Asst. Merchandiser at A.M.C.S Textile Ltd

**Email:**raju.uttara72@yahoo.com

**Sewing Thread Consumption**

**Sewing thread**is required for seam sewing/assembling, over locking, various types of stitching, buttonholing, label attachment etc. Besides, it is important to know the amount of thread consumed in a sewn product. We often need figure out thread consumption of various items like Shirt, Shorts, Tank tops and Pants etc. Thread consumption means how much

**thread**we need to stitch a product.

**Thread consumption can be determined in several ways. To calculate the amount of thread in a seam, you can:**

- Measure the actual amount of thread consumed in a specific length of seam.
- Calculate the thread consumption by using mathematical stitch formulas based on the thickness of the seam and the number of stitches per inch.
- Calculate the thread consumption using A&E’s ANECALC spreadsheets.

ANECALC spreadsheets (Click on image for large size) |

*****Example:**

Stitch and seam: 401 SSa-1

Stitches per inch: 8

Thickness of the seam: .075 inches (measured with a micrometer)

Length of the seam: 42 inches or 1.17 yds.

**Union Special 401 Chainstitch Chart**

**Consumption based on the mathematical equation – C = 4 + 2ts**

C = 4 + 2(.075 X 8) = 5.20

Where,

t = thickness of the seam

s = stitches per inch

Here, 1.17 yds X 5.20 = 6.08 yds / seam.

=> 6.08 yds/seam X 1.15 = 7.00 yds per seam including a 15% waste factor.

*** A shirt having 104 inches 4 Threads Over lock stitches, 52 inches Flat lock stitches, 20 inches 1 Needle Chain stitches, 15 inches Single Needle Plain Machine stitches, GSM is normal, find out its thread consumption in meters?

**Answer:**{(104 x 19) + (52 x 32) + (20 x 5) + (15 x 2.75) + 10%} / 39.37 = 106.71 Meters. (39.37 inches = 1 Meter)

*** Suppose, we want to buy thread cones with 2000 meters thread, now figure out how many cones do we need to stitch 3000 pcs of garments, per garment’s thread consumption 106.71 meters?

**Answer:**106.71 x 3000 / 2000 = 160 cones.