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 calculated sheet area and rounded upward using the shared purchase-unit helper.
2 × (length + width) × height × quantitylength × width × quantitygross area − door, window, and other deductionsnet area × (1 + waste % ÷ 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 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 sheets of 4 × 8 drywall.
A known 50 m² area becomes 55 m² with 10% waste. A 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.
Area estimation does not optimize orientation, seams, framing, codes, or cut reuse; actual layout can change quantity.
US presets include common 4-foot widths and several lengths. Metric and custom dimensions are calculated from their actual converted width and length rather than hardcoded sheet areas.
Optional screws use a user-entered screws-per-sheet rate. Joint compound and tape use user-entered area coverage per container or roll. No universal spacing or coverage is assumed.
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 area and round upward.
Calculate wall perimeter times height and add selected ceiling area.
A 4 × 8 ft sheet covers 32 ft².
A 4 × 12 ft sheet 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 rate.
Optionally, from your entered coverage rates; it does not infer seams from area.
No. Cost estimates are material-only.