How Many Sheets of Drywall for a 12x12 Room?
Drywall sheets
19 sheets
Four walls at 12 by 8, plus a 12 by 12 ceiling: 528 square feet, no openings deducted.
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How that number is worked out
These are the figures this page was built with and every line the calculator produces from them. Change anything above and all of it moves.
- Total area to cover528 sq ft
- Sheet size4 x 8 ft, 32 sq ft
- Waste allowance10 %
Drywall sheets19 sheets
| Area with 10% waste | 581 sq ft |
|---|---|
| Sheets at 32 sq ft | 19 |
| Joint compound, 4.5 gal buckets | 2 |
| Joint tape | 221 lf |
| Screws | 608 (about 2 lb) |
| Corner bead, rough guess | 35 lf |
The material list this produces
| Drywall sheets | 19 |
|---|---|
| Joint compound, 4.5 gal buckets | 2 |
| Joint tape, linear ft | 221 |
| Drywall screws, lb | 2 |
Sheet size compared
Longer sheets mean fewer butt joints and less taping. Same area, three sheet sizes.
| Sheet size | Drywall sheets |
|---|---|
| 4 x 8 ft | 19 sheets |
| 4 x 10 ft | 15 sheets |
| 4 x 12 ft | 13 sheets |
What else matters here
Five hundred and twenty eight square feet is nineteen sheets of four by eight with waste in, or thirteen sheets of four by twelve. That difference is not just sheet count, it is joints: a 12 foot sheet across a 12 foot wall has no butt joint, and two 8 footers on the same wall add one.
Butt joints are where a bad drywall job announces itself. They have no tapered edge, so they are finished by building the compound out wide enough to hide a bump. Fewer butt joints means less taping, less sanding and a flatter wall.
So if twelve foot board will physically get into the room, use it. If the stairwell, the hallway turn or the doorway says no, eight footers are the answer instead.
What this calculator assumes
- Joint compound is figured at one 4.5 gallon bucket per 475 sq ft of board for a full three coat finish. A level 5 finish uses more.
- Tape is figured at 380 linear feet per 1000 sq ft of board, screws at 32 per sheet for 16 inch on center framing.
- Longer sheets mean fewer butt joints, which is less taping and a flatter wall. Use 12 footers where they will fit through the door.
Questions people ask
How many sheets of drywall for a 12x12 room?
About 19 sheets of 4 by 8, or 13 sheets of 4 by 12, covering walls and ceiling with ten percent waste.
Is 12 foot drywall better than 8 foot?
On a 12 foot wall, much better, because it eliminates the butt joints entirely. The catch is getting it into the room, and on a remodel that is often the limiting factor.
The drywall calculator takes any dimensions you like and hands back the same list.