What is the square footage of a 4x8 sheet of drywall?

A standard 4 ft × 8 ft sheet of drywall covers 32 square feet. A 4 ft × 12 ft sheet covers 48 square feet.

🧱 Wallboard & Framing Materials

Drywall & Sheetrock Panel Calculator

Estimate the number of 4x8 and 4x12 drywall sheets required for walls and ceilings, plus joint compound (mud), fasteners (screws), and joint tape.

Room Length (ft):

Room Width (ft):

Wall Height (ft):

Waste Allowance:

Include Ceiling Drywall

4x8 Drywall Sheets Required
22 Sheets
or 15 Sheets of 4x12 Panels (Fewer Seams)

Total Surface Area

640 sq ft

Joint Compound (Mud)

9.0 Gallons

Drywall Screws

680 Screws (~3.5 lbs)

Use 4x12 sheets if your room allows for it—longer panels eliminate vertical butt joints and reduce taping labor by ~30%.

Calculate combined wall perimeter area and optional ceiling square footage:

4x8 Panels: Covers $32\text{ sq ft}$ per sheet ($4 \times 8$).
4x12 Panels: Covers $48\text{ sq ft}$ per sheet ($4 \times 12$).
Joint Compound (Mud): Approximately 0.053 gallons per sheet of drywall.
Fasteners: Approximately 32 screws per 4x8 sheet (spaced 12-16 inches on studs).