Fabric yardage calculators are available from Wesco, Sailrite and Quilter's Paradise. Both Wesco and Sailrite offer a visual selection interface with different calculators based upon different project types. Quilter's Paradise uses the fabric width to determine how many yards are needed to cover the required area.
Wesco offers four different categories: drapery, shade/topper, bedding and pillow. Within each category are calculators for different styles such as Australian shades, cornices, pinch pleated panel drapery and duvet with or without a welt. Sailrite offers a few more categories such as umbrellas and awnings. Included in each Sailrite calculator are visual guides for appropriate measurement.