4×8 drywall sheets by room size
| Room size | Gross wall area | 4×8 sheets + 10% |
|---|---|---|
| 8 × 10 ft | 288 ft² | 10 sheets |
| 10 × 10 ft | 320 ft² | 11 sheets |
| 10 × 12 ft | 352 ft² | 13 sheets |
| 12 × 12 ft | 384 ft² | 14 sheets |
| 12 × 14 ft | 416 ft² | 15 sheets |
| 12 × 16 ft | 448 ft² | 16 sheets |
| 14 × 16 ft | 480 ft² | 17 sheets |
| 15 × 20 ft | 560 ft² | 20 sheets |
| 20 × 20 ft | 640 ft² | 22 sheets |
Planning quantities are based on rectangular rooms, 8-foot walls and 10% waste. Layout, openings, ceiling work, sheet orientation and local installation practices can change the quantity.
Example: 12 × 12 room
A 12 × 12 ft room with 8 ft walls has 384 ft² of gross wall area. Adding 10% gives 422.4 ft². Dividing by 32 ft² per 4×8 sheet and rounding up gives 14 sheets before deducting doors and windows.
Build the complete drywall takeoff
Use exact room dimensions, openings, sheet length and waste to estimate sheets, screws, joint compound and tape.
Open Drywall Calculator →Should doors and windows be deducted?
For a more exact material estimate, openings can be deducted from wall area. For very small projects, some installers choose not to deduct every opening because offcuts and layout constraints can consume much of that theoretical savings. BuildGauge exposes the deduction so you can see the net wall area explicitly.
For paint and wallpaper planning, visit the Walls & Finishes Planning Hub.