Wall Calc contains calculators that implement proven estimation algorithms for over twenty different paint types, wallpaper, and drywall! The calculators determine area, and adjust for windows and doors when needed. The drywall calculator even tells you how many pounds of nails you will need! The quantity of materials needed is automatically adjusted for industry standard spoilage and wastage. Whether you are a professional contractor or a home improvement do-it-yourselfer, Wall Calc will save you time, trouble, and money by providing more accurate materials estimates.