12x14 Room Drywall: 21 Sheets of 4x8 (Walls + Ceiling)

Ceiling	Wall sq ft	Total sq ft	4x8 sheets	4x12 sheets
8'	416	584	21	14
9'	468	636	22	15
10'	520	688	24	16
12'	624	792	28	19

Ceiling

Wall sq ft

Total sq ft

4x8 sheets

4x12 sheets

416

584

468

636

10'

520

688

12'

624

792

Item	Walls only	Walls + ceiling
4x8 sheets	15	21
Screws (1-1/4")	416	584
Paper tape	154 ft	217 ft
All-purpose mud (4.5 gal)	1	2

Item

Walls only

Walls + ceiling

4x8 sheets

Screws (1-1/4")

416

584

Paper tape

154 ft

217 ft

All-purpose mud (4.5 gal)

How the math works

Perimeter: 2 × (12 + 14) = 52 ft
Wall area: 52 × 8 ft = 416 sq ft
Ceiling: 12 × 14 = 168 sq ft
Total × 1.10 waste = 642.4 sq ft
4x8 sheets: ÷ 32 = 21; 4x12 sheets: ÷ 48 = 14

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 12x14 room?

21 sheets of 4x8 for walls and ceiling with 8' walls (15 for walls only), including 10% waste.

How many 4x12 drywall sheets for a 12x14 room?

14 sheets of 4x12 for walls and ceiling — fewer seams to tape than 21 4x8s.

How much mud and tape for a 12x14 room?

About 217 ft of paper tape and 2 × 4.5-gallon buckets of all-purpose compound for three coats.

How many drywall screws for a 12x14 room?

Roughly 584 1-1/4" screws (about one per sq ft at 16" OC framing) — a 5 lb box is plenty.

12x14 Room Drywall Calculator

Quick answer

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12x14 room by ceiling height (walls + ceiling)

Finishing materials for 12x14