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Sheets, joint compound, tape and screws priced for a room, with ceiling and layer options.
Common US rooms with 8 ft ceilings and the ceiling included.
Tap a preset in the calculator above to load a typical job, then adjust the numbers to match your site.
Starting points: Bedroom 12 × 10 ft · Living room 20 × 15 ft · Garage 24 × 24 ft · Basement 30 × 20 ft · Bedroom with 4 × 12 sheets
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Measure the room, subtract openings, then order sheets, mud and tape together.
Divide the wall and ceiling area by the sheet size and add 10 percent. A 12 × 10 ft room with 8 ft ceilings needs about 20 sheets of 4 × 8 drywall including the ceiling.
A 4 × 8 ft sheet of half-inch drywall costs about $15 to $20 at a US home center, and 4 × 12 sheets run $22 to $30. Installed cost is $1.50 to $3.50 per sq ft.
About 1 lb per 20 sq ft of board for three coats, so a 500 sq ft room needs roughly 25 lb. Boxes are sold in 4.5 gallon sizes, about 55 lb.
Roughly 1 ft of tape per 3 sq ft of board. Buy 500 ft rolls for a full room and keep the remainder for repairs.
Half-inch is standard for walls and ceilings with joists 16 in on centre. Five-eighth is better for ceilings 24 in on centre, for fire rating and for sound insulation.
About 32 screws per 4 × 8 sheet on walls and slightly more on ceilings, spaced 12 in on centre. Use coarse thread into wood and fine thread into steel studs.
Using the calculator defaults, bedroom 12 × 10 ft gives Sheets needed: 17 and Material cost: $323, with a typical range $258 to $420. Change the waste allowance, material or thickness to match your site.
Using the calculator defaults, bedroom with 4 × 12 sheets gives Sheets needed: 11 and Material cost: $314, with a typical range $251 to $408. Change the waste allowance, material or thickness to match your site.