Estimate drywall sheets for walls, ceilings, multiple rooms, or known areas with editable openings, sheet dimensions, waste, accessories, and material cost.
Wall area uses room perimeter times height; selected ceilings add length times width. All dimensions normalize to meters and all areas to square meters.
Openings are subtracted before one waste allowance is applied. Recommended area is divided by the area of the user-entered sheet dimensions and rounded upward to whole sheets.
2 × (length + width) × height × quantitylength × width × quantitygross area − door, window, and other deductionsnet area × (1 + waste percentage ÷ 100)sheet width × sheet lengthceiling(recommended area ÷ sheet area)whole-sheet purchased area − recommended areaA 12 × 10 ft room with 8 ft walls has 352 ft². With 10% waste and user-entered 4 × 8 ft sheets, 387.2 ÷ 32 = 12.1, so buy 13 sheets; purchased coverage is 416 ft² and estimated leftover is 28.8 ft².
Including the 120 ft² ceiling makes gross area 472 ft². With 10% waste, 519.2 ft² requires 17 user-entered 4 × 8 sheets.
A known 50 m² area becomes 55 m² with 10% waste. A user-entered 1.2 × 2.4 m board covers 2.88 m², so buy 20 boards.
Whether to deduct small openings depends on how offcuts will be used; the calculator leaves that decision to you.
The editable 10% default is a planning convention, not a universal requirement.
The initial 4 × 8 ft dimensions and other preset buttons are editable planning conveniences, not a universal sheet format or installation requirement.
Area estimation does not optimize orientation, seams, framing, codes, or cut reuse; actual layout can change quantity.
US presets offer 4-foot widths with several lengths as editable starting points. Metric and custom dimensions are calculated from the actual width and length entered rather than hardcoded sheet areas.
Optional screws use a user-entered screws-per-sheet planning rate. Joint compound and tape use user-entered area coverage per container or roll. These simple rates do not establish screw spacing, fastening schedules, seam length, finishing level, or product yield.
Optional costs cover sheets and configured accessories only. Labor, delivery, taxes, framing, insulation, paint, finishing labor, and disposal are excluded.
Divide recommended area including waste by one sheet's entered area and round upward.
Calculate wall perimeter times height and add selected ceiling area.
A sheet entered as 4 × 8 ft covers 32 ft².
A sheet entered as 4 × 12 ft covers 48 ft².
That depends on planned offcut reuse; enter openings only when you want them deducted.
Waste depends on layout, cuts, damage, and experience. The editable default is 10%.
Select Include ceiling; length times width is added to wall area.
Yes. Add each room with independent dimensions, ceiling selection, and quantity.
Whole sheets must cover the calculated requirement.
Optionally, using your editable screws-per-sheet planning rate, not a fastening schedule.
Optionally, from your entered coverage rates; it does not infer seams or product requirements from area.
No. Cost estimates are material-only.