Drywall Calculator — Sheets, Screws, Mud & Tape
Enter your dimensions for an instant answer — the exact quantity to buy (waste included), a material cost, and an estimated installed cost. Change any figure to update the result live.
Your project
Standard size shown by default. Change any value — the answer recomputes instantly.
You need
284x8 sheets (32 ft²)
Exact need: 25 4x8 sheets (32 ft²) · plus 10% waste allowance
Material cost
$308–$504
Installed (US avg)
$1,532–$2,160
Shopping list
| ITEM | QTY | PRICE RANGE |
|---|---|---|
| 4x8 sheets (32 ft²) | 28 | $308–$504 |
| Estimated material total | $308–$504 |
Companion materials
- Drywall screws: 896 screws (≈ 3 lb)
- Joint compound: 6.6 gallons
- Joint tape: 334 ft
Alternative buy formats
- 19 × 4x12 sheets (48 ft²) — $304–$494
Material spec & worked example
Waste allowance
10%
Typical price
$11–$18 4x8 sheets (32 ft²)
800 sq ft of wall/ceiling: you need 25 4x8 sheets (32 ft²) (buy 28 with waste), about $308–$504 in materials. See how we calculate this →
Installed cost by state
See a regionally-adjusted installed estimate — materials, labor, total.
View cost by state →Frequently asked
How many drywall sheets do I need?
Divide total wall and ceiling area by 32 (for 4×8 sheets) or 48 (for 4×12), then add ~10% for waste. The calculator also gives screws, mud and tape.
How much joint compound and tape?
Plan on about 0.75 gallons of compound and 38 feet of tape per 100 square feet of drywall.