Drywall Screw Count Calculator

Drywall screw spacing follows building codes and manufacturer recommendations. Proper fastening prevents nail pops, sagging, and loose panels.

Standard screw spacing:

• Walls: Every 16 inches (40 cm) along studs, and 8 inches (20 cm) along edges
• Ceilings: Every 12 inches (30 cm) along joists, and 8 inches (20 cm) along edges

Screws per sheet (4×8 ft / 1.2×2.4 m):

• Wall with 16-inch stud spacing: approximately 28–32 screws
• Ceiling with 16-inch joist spacing: approximately 36–40 screws
• Wall with 24-inch stud spacing: approximately 22–26 screws

The formula:

1. Count vertical studs per sheet: Sheet width (48 in) / Stud spacing + 1
2. Count screws per stud: Sheet height (96 in) / Screw spacing along stud
3. Add edge screws: Perimeter / Edge screw spacing
4. Total per sheet = Stud screws + Edge screws

Screw types and sizes:

• 1-1/4 inch (32 mm) — Standard for 1/2-inch drywall on wood studs
• 1-5/8 inch (41 mm) — For 5/8-inch drywall or double-layer applications
• Fine thread — For metal studs (grip better in thin metal)
• Coarse thread — For wood studs (standard choice)

Box sizes:

• Small box: 100 screws
• Medium box: 200 screws
• Bulk box: 1,000 screws (best value for large projects)

Tip: Buy 15% more screws than calculated. Dropped screws, misdrives, and stripped heads mean you will always use more than the exact count. Screws are cheap — running to the store mid-project is not.