Drywall Screws Calculator
Calculate the total number of drywall screws needed based on number of sheets, screw spacing, and stud spacing.
Includes a 10% waste allowance.
How Many Drywall Screws Do You Need?
Proper screw spacing is essential for a solid drywall installation. Too few screws and panels can sag or pop. Too many is wasteful and time-consuming.
Standard Screw Spacing Rules
Building codes and manufacturer guidelines generally specify:
- Field screws (middle of the panel): every 12 inches (300 mm) along each stud
- Edge screws (along panel edges): every 8 inches (200 mm) along each stud
The standard stud spacing is 16 inches (400 mm) on center in residential construction, though 24-inch (600 mm) spacing is used in some commercial and open-web applications.
Screw Count Per Sheet
For a standard 4×8 ft (1.2×2.4 m) drywall sheet with 16-inch stud spacing:
| Location | Studs Covered | Screws Per Stud | Total |
|---|---|---|---|
| Short edges (8 ft span) | 7 studs | 2 per edge | ~14 |
| Field (middle studs) | 5 studs | 8 per stud | ~40 |
| Total per sheet | — | — | ~32–40 |
As a practical rule: approximately 32–36 screws per 4×8 sheet at 16-inch stud spacing.
Screw Types
| Screw Type | Use |
|---|---|
| 1-1/4 inch (6d) | Single-layer 1/2-inch drywall on wood framing |
| 1-5/8 inch | Single-layer 5/8-inch drywall on wood framing |
| 1-1/4 inch (fine thread) | Drywall to metal studs |
| 3 inch (coarse) | Double-layer drywall |
For wood framing, use coarse thread screws. For metal framing, use fine thread screws.
Typical Quantity Estimates (Per Sheet)
- 16" stud spacing = ~32–36 screws/sheet
- 24" stud spacing = ~24–28 screws/sheet
Always buy 10–15% extra to account for misses, dropped screws, and repairs.