How the drywall estimate works
walls = 2 × (length + width) × heightsheets = (net area × waste) ÷ sheet coverageThe calculator subtracts openings, adds the ceiling when selected, applies waste, and rounds sheets up to a whole unit.
Drywall calculator
Plan sheets and common finishing materials for the four walls and optional ceiling of a rectangular room.
Enter room dimensions
Subtract the combined area of doors, windows, and other large openings.
A sheet layout is the final quantity check
Area determines a useful starting count, but sheet orientation, staggered joints, ceilings, fire-rated assemblies, moisture-resistant areas, and small returns affect the number and type of panels.
- Lay out seams on framing and avoid unsupported edges.
- Separate panel types and thicknesses before totaling sheets.
- Use project specifications for screws, tape, compound, corner bead, and control joints.
Layout changes the takeoff
Sheet orientation, staggered joints, fire-rated assemblies, moisture-resistant areas, and double layers can change the actual order. Confirm local code and assembly requirements before purchasing.