Screw count scales directly with sheet count, not raw square footage, since fasteners are placed at a fixed spacing along studs regardless of how big each sheet is — a standard 4×8 sheet on studs spaced 16 inches on center typically takes about 32 screws, spaced roughly every 16 inches along the field and edges. This calculator backs into an estimated sheet count from your total area, then multiplies by your screws-per-sheet rate.