Drywall Calculator
Room length (ft)
Room width (ft)
Wall height (ft)
Ceiling
Include the ceiling
Walls only
Doors
Windows
Sheet size
4 x 8 ft sheet (32 sq ft)
4 x 10 ft sheet (40 sq ft)
4 x 12 ft sheet (48 sq ft)
Advanced assumptions (optional)
Waste allowance (0–0.5)
Calculate materials
A room with drywall on the walls and ceiling; door and window openings are subtracted from the wall area
Ceiling (optional)
4 ft sheets
Door −21 sq ft
Window −15
Wall area = perimeter × height − openings
Calculator by Build Material Planner