How to determine GSM of woven fabric from its construction?


Home > Garment & Textile Testing

To determine approximate GSM (grams per square meters) of a given fabric, you can use following formula. One of my colleagues used to use this formula in testing lab. In case different counts of warp thread or weft thread is used then this formula will not give you correct GSM. It is also known as conversion formula from fabric construction to fabric weight.

Fabric GSM = (EPI/warp count + PPI/Weft count) x (100+crimp %) X 0.2327

For example, construction of a fabric is 40 X40 /120 X 60 and warp and weft crimp is 6%. Then GSM of this fabric will be,

GSM = (120/40 + 60/40) X (100+6%) X 0.2327

GSM =104.77

I found others to use this formula with different multiplying factors.

Fabric GSM= ((EPI/warp count X 1.1) + (PPI/weft count x 1.04)) x 23.5 By Dharmi 
Where 1.1 and 1.04 are warp and weft crimp factors respectively.


What is Next?


Subscribe our Free tutorials by entering your E-mail id and activate subscription by clicking on the link you receive in your mail box.

Enter your email address:




Related Articles

How to Calculate GSM of Fabric?