This document provides information and formulas for calculating the weight and grams per square meter (GSM) of a fabric based on its warp and weft yarn counts, ends per inch (EPI), picks per inch (PPI), and warp and weft crimp percentages. It first lists relevant yarn counts, weave structures, and conversion factors. It then shows the specific calculations to determine the warp and weft yarn lengths and weights based on given sample data, and sums the weights to find the total GSM of 110.5.

1. Calculating.

2.  Warp Yarn Count
 Weft Yarn Count
 EPI – Ends Per Inch
 PPI – Picks Per inch
 Warp Crimp
 Weft Crimp

3. CONVERSION FACTORS
 1 Pound = 453.6 grm
 1 pound = 16 ounce
 1 ounce = 28.75 grm
 1 kg = 2.22 pound
 1 yard = 36 inches
 1 hank = 840 yard
 1 meter = 1.09 yard
 1 meter = 39.4 inch
 1 inch = 2.54 cm

4. CALCULATING GSM.
 Data;;
 Warp No = 20s Ncc
 Weft No = 30s
 EPI = 60
 PPI = 50
 Warp crimp= 2.5%
 Weft crimp= 1.5%

5. FINDING GSM..
Warp Length = 39.4 x 60= 2364m+2.5% =2423.17m
Weft length = 39.4 x 50= 1970 m+1.5%=1999.55m
Yarn weight = Yarn length in yards
840 x Nec in Lbs
Warp weight = 2423.17 x 1.09 x 453.6 = 71.3
840 x 20
Weft weight = 1999.55 x 1.09 x 453.6 = 39.2
840 x 30
GSM = 71.3 + 39.2 = 110.5 Gsm