Calculating Drapery and Fabric Weight

1)    Fabric Weight - Some fabric samples list on the back of the swatch the weight listed in Ounces/SqYd (Ounces per Sqaure Yard). Call the manufacturer for the weight if not listed anywhere.

2)   Lining Weight – Most drapery linings are  2oz - 4oz - Per Square Yard.

·         Finding Drapery Weight Formula:

Total Square Yards = (Total Yards x 36 x Fabric Width) ÷ 1296 (1-Sqaure Yard)

Weight = Total Square Yards x Weight in ounces per SqYd) ÷ 16 oz in 1 Lb

Example: 32 Yards of 54” wide fabric weighing 14 oz/SqYd

Total Square Yards = (32 x 36 x 54)= 62,208 ÷ 1296 = 48 SqYds

Weight = (48 x 14oz) = 672 ÷ 16 = 42 Lbs

·         Finding Lining Weight Formula:

Total Square Yards = (Total Yards x 36 x Fabric Width) ÷ 1296 (1-Sqaure Yard)

Weight = Total Square Yards x Weight in ounces per SqYd) ÷ 16 oz in 1 Lb

Example: 32 Yards of 54” wide lining weighing 6 oz/SqYd

Total Square Yards = (32 x 36 x 54)= 62,208 ÷ 1296 = 48 SqYds

Weight = (48 x 4oz) = 192 ÷ 16 = 12 Lbs

Chart of Fabrics by Weight

 Fabric Type Weight per Square Yard Drapery Lining 2~4 oz Interlining 5~6 oz Blackout Lining 6~10 oz Bump Lining 12~14 oz Silks 2~4 oz Chintz 2~4 oz Printed Cottons 4~6 oz Linens 6~10 oz Jaquards 10~14 oz Velvets 14~18 oz

Contact the fabric manufacturer for your specific fabric weight

Note: If overall Fabric and Lining weight exceeds 55 Lbs, choose the Somfy Glystro 50 Motor