Worked example

How Many Drywall Sheets for a 12x12 Room?

This example estimates 4 x 8 drywall sheets for a 12 ft by 12 ft room with 8 ft walls and ceiling included.

Drywall

Calculator inputs

Drywall Calculator Results

Results update in your browser as you edit inputs. They are planning estimates, not complete shopping lists.

Enter project dimensions to calculate material quantity.

Inputs used in this example

Room size: 12 ft by 12 ft.
Wall height: 8 ft.
Sheet size: 4 x 8 ft.
Ceiling included, with 10% waste.

Expected output

The calculator estimates 384 sq ft of wall area, 144 sq ft of ceiling area, 17 base sheets, and 19 sheets after 10% waste.

When to adjust this example

Turn off the ceiling option if the ceiling is not part of the drywall job.
Change sheet size if you can handle longer sheets and want fewer seams.
This example does not include openings, sheet orientation, joint compound, tape, screws, corner bead, or finishing supplies.

Formula explanation

Compute wall area from room perimeter times wall height.
Add ceiling area when included.
Divide total area by sheet area and round up.
Apply waste to the rounded base sheet count.

Main calculator

Use the full Drywall Calculator to change dimensions, waste factor, and optional user-entered unit price.

FAQ

Does this subtract doors and windows?

No. It estimates sheet count from total area and does not model openings or seam layout.

Can I use 4 x 12 sheets?

Yes. Change the sheet size in the embedded calculator.