11x12 Room Drywall: 18 Sheets of 4x8 (Walls + Ceiling)

Ceiling	Wall sq ft	Total sq ft	4x8 sheets	4x12 sheets
8'	368	500	18	12
9'	414	546	19	13
10'	460	592	21	14
12'	552	684	24	16

Ceiling

Wall sq ft

Total sq ft

4x8 sheets

4x12 sheets

368

500

414

546

10'

460

592

12'

552

684

Item	Walls only	Walls + ceiling
4x8 sheets	13	18
Screws (1-1/4")	368	500
Paper tape	137 ft	185 ft
All-purpose mud (4.5 gal)	1	2

Item

Walls only

Walls + ceiling

4x8 sheets

Screws (1-1/4")

368

500

Paper tape

137 ft

185 ft

All-purpose mud (4.5 gal)

How the math works

Perimeter: 2 × (11 + 12) = 46 ft
Wall area: 46 × 8 ft = 368 sq ft
Ceiling: 11 × 12 = 132 sq ft
Total × 1.10 waste = 550.0 sq ft
4x8 sheets: ÷ 32 = 18; 4x12 sheets: ÷ 48 = 12

Don’t subtract doors and windows on small rooms — the cut-offs rarely get reused. On big rooms subtract openings over 50 sq ft.

Trade pro tips

Hang the ceiling first, then walls top row first so the factory edge meets the ceiling.
Use 1/2" on walls; 5/8" or 1/2" ceiling board on ceilings framed 24" OC.
Stagger end joints and keep them off door and window corners.

Frequently asked questions

How many sheets of drywall for a 11x12 room?

18 sheets of 4x8 for walls and ceiling with 8' walls (13 for walls only), including 10% waste.

How many 4x12 drywall sheets for a 11x12 room?

12 sheets of 4x12 for walls and ceiling — fewer seams to tape than 18 4x8s.

How much mud and tape for a 11x12 room?

About 185 ft of paper tape and 2 × 4.5-gallon buckets of all-purpose compound for three coats.

How many drywall screws for a 11x12 room?

Roughly 500 1-1/4" screws (about one per sq ft at 16" OC framing) — a 5 lb box is plenty.

11x12 Room Drywall Calculator

Quick answer

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11x12 room by ceiling height (walls + ceiling)

Finishing materials for 11x12