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Take the width in inches. Divide by 12. Multiply by the length of the roll in feet. That will tell you the square footage of any given roll. For example, a 50″ roll of 10 mil Pearlveil: 50 divided by 12 is 4.166. Multiply by the average length of a Pearlveil 10 mil—1750 linear feet—to get the average square feet on a roll—7292 square feet.
