How do calculate Yards to kgs (Knit fabric)-

How do calculate Yards to kgs (Knit fabric)

Fabric length = 3.3611 yards (121 ")
Fabric Width = 45 "
Fabric GSM = 140


Rules-1:  If Fabric length (Inch)
Fabric weight (kg) = Fabric length (inch) × Fabric width × GSM / 1550 / 1000

= 121" × 45" × 140 /1550 / 1000
= 762300 /1550 /1000
= 0.49180645161 kgs (weight of the followings fabric)

Rules-2:  If Fabric length (Yards)
Fabric weight (kg) = Fabric length (Yard) × Inch per yard × Fabric width × GSM / 1550 / 1000
Fabric weight (kg) = 3.3611 × 36 × 45" × 140 / 1550 / 1000
Fabric weight (kg) = 0.4918048258 kg 

Thanks by Rubel.