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Drywall Calculator FAQ
Estimate drywall sheets, framing, screws, finishing materials, and cost from one room worksheet.
FAQ
How do I calculate drywall for a room?+
Measure the room length, width, and height. For walls, the calculator uses 2 x (length + width) x height, subtracts doors and windows, then divides by the area of one sheet and adds waste.
Does the ceiling mode subtract doors and windows?+
No. Openings are wall deductions only. Ceiling mode uses length x width, while Whole Room mode adds the ceiling area to the net wall area.
What waste percentage should I use?+
Ten percent is a practical default for a simple rectangular room. Use more for rooms with many openings, closets, alcoves, angled walls, or if you want extra sheets on hand.
Are the material quantities exact?+
They are estimating quantities for planning and shopping. Final needs can change with sheet layout, local fastening rules, corner details, product size, and installer preference.
Can I export the drywall material list?+
Yes. The calculator includes a CSV export for the material table and a print action for a compact material sheet.