Quick lookup
Drywall sheets needed for common rooms (1/2 inch sheets, walls + ceiling)
Standard 4×8 ft sheets cover 32 sq ft each. Assumes 8 ft ceilings, walls + ceiling, 10% waste factor. Add 1 box of screws per 8 sheets, 1 gallon mud per 4 sheets, 250 ft tape per 8 sheets.
| Room size | Wall + ceiling sq ft | Sheets | Screws (1 lb) | Mud (gal) | Tape (250 ft) |
|---|---|---|---|---|---|
| 8 × 10 ft | 324 | 11 | 2 lb | 3 gal | 1 roll |
| 10 × 12 ft | 412 | 13 | 2 lb | 4 gal | 1 roll |
| 12 × 12 ft (bedroom) | 464 | 15 | 3 lb | 4 gal | 2 rolls |
| 12 × 14 ft | 508 | 16 | 3 lb | 4 gal | 2 rolls |
| 14 × 16 ft (living) | 672 | 21 | 4 lb | 6 gal | 2 rolls |
| 16 × 20 ft | 880 | 28 | 5 lb | 7 gal | 3 rolls |
| 20 × 24 ft (great room) | 1,184 | 37 | 7 lb | 10 gal | 4 rolls |
| Whole 1,500 sq ft floor | 3,400 | 107 | 20 lb | 27 gal | 11 rolls |
Use 5/8 inch sheets on ceilings 24+ inches OC and on garage ceilings (fire code). Moisture-resistant green-board for bathrooms (around tubs/showers only). Cement board behind tile.
Quick answer
How much drywall do I need?
The complete drywall materials list: sheets, screws, joint compound (mud), and tape. People skip the latter three and then make 4 store trips during a single weekend project. Our calculator does the full list with realistic quantities.
Formula: wallArea = perimeter × height, minus doors and windows, sheets = ⌈(wallArea + ceiling) × 1.15 ÷ sheetArea⌉. The 15% covers waste from cuts and odd corners.
The math
The formula explained
Sheets
Standard 4×8 sheet covers 32 sq ft. 4×12 covers 48 sq ft. 4×12 is great for tall walls because it eliminates a horizontal seam, but it needs 2 people to install (one sheet weighs 80 lbs).
Screws
About 32 screws per sheet for walls, 36 for ceilings. Buy 1 lb per 4 sheets — about 350 screws per pound for 1-5/8 inch drywall screws.
Joint compound (mud)
A 5-gallon bucket (60 lb) of premixed mud covers about 1,000 sq ft of finished area through all coats. Always buy at least one extra bucket — running out mid-coat is brutal.
Tape
About 1 linear foot of tape per sq ft of drywall as a rough rule. Standard paper tape rolls are 250 feet.
Choose your sheet
Sheet size: 4×8 vs 4×12
4×8 sheets (32 sq ft): Easier to move, carry, and install solo. Best for most rooms.
4×12 sheets (48 sq ft): Fewer horizontal seams on tall walls. Best for ceilings of 9+ ft rooms. Needs two people minimum.
Use cases
Common projects
Small bedroom (10' × 10' × 8' walls + ceiling)
About 12 sheets of 4×8. 1.5 buckets of mud. 1 roll of tape.
Master bedroom (14' × 12' × 9' + ceiling)
About 18 sheets. 2 buckets. 1 roll.
Basement (full 1000 sq ft + walls)
About 50-60 sheets of 4×12. 6 buckets. 3 rolls of tape.
Garage conversion (20' × 20' × 8' walls + ceiling)
About 30 sheets. 4 buckets. 2 rolls.
Bathroom (8' × 6' × 8' walls)
About 7 sheets. 1 bucket. 1 small roll. Use moisture-resistant green board near tub.
Closet (4' × 6' × 8')
About 4 sheets. 1 small bucket. Half a roll.
Material guide
Drywall types and where to use them
- Regular (white) — for most walls and ceilings. Cheapest. 1/2 inch thickness is standard.
- Moisture-resistant (green board) — for bathrooms within 18 inches of water sources.
- Cement board (Durock) — under tile in showers and tub surrounds. Required, not optional.
- Type X (fire-rated) — for walls between garage and house, around furnaces. 5/8 inch thickness.
- 5/8 inch ceiling sheets — for ceilings to prevent sag between joists 24 inches apart.
- Soundproof drywall (QuietRock) — bedroom walls in townhouses, home theaters. Pricey but effective.
From taping to texture
Finishing tips
- Three coats minimum: tape coat (fills seam + holds tape), second coat (4-6 in wide, fills tape edges), skim coat (10-12 in wide, feathers everything smooth).
- Sand between every coat with 220 grit. Wear a mask and use a damp shop vac to control dust.
- Use mesh tape for corners that flex. Paper tape for flat seams (stronger).
- Joint compound shrinks as it dries — multiple thin coats beat one thick coat every time.
- Allow 24 hours between coats for premixed mud, 1-2 hours for setting type (90, 45, 20 numbers refer to working time in minutes).
- Prime before paint. Drywall absorbs paint differently than joint compound — primer evens it out.
Hire out the taping if it's your first job
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Last reviewed: · Methodology based on US building code standards, contractor pricing surveys, and manufacturer specifications.