I've been looking for easy online calculator to calculate the weight of the rolls of fabric …?

I've been looking for online calculator easy to calculate the weight of the fabric rolls sometimes simply imputting yards long by width of fabric sometimes a measure of weight per meter / meter. Sounds like a lot, but this is a question I've heard in the world of fashion, but nobody I know has an answer: (help!

Just set up a simple equation in a spreadsheet or a programmable calculator and save it for later use. length (in feet) x width (in meters) x weight (in units per square meter) = weight of the roll. For example, to 72 "wide goods, roll of 100 yards, 5 ounces per square meter: 2 meters x 100 meters = 200 square meters x 5 ounces / square yard = 1000 grams = 62.5 lbs (+ the weight of the core and envelope) to 63 "of goods, 323 yards, 4.2 oz of goods: 63" = 1.75 meters 1.75yd x 323 m = 565.25 565.25 meters square meters mx 4.2 ounces / sq yard = 2 374.05 grams = 148.378 pounds