Project ticket

Drywall for a 12x14 room addition

A 12×14 ft room with 9 ft walls has 468 sq ft of wall area and 168 sq ft of ceiling before opening deductions. With 10% waste, this example estimates 22 sheets of 4×8 ft drywall for both surfaces combined.

Drywall sheets, T-square, mesh tape, and fasteners in a clean room

Start with your measurements

Size up your project

Example values are filled in. Replace them with your project measurements.

Wall area sq ft

Ceiling area sq ft

Sheet waste allowance %

Sheet count uses 4 × 8 ft panels. Confirm panel specification, fastening schedule and seam layout separately.

Before you order

Confirm board size/type and fixing requirements.
Measure seams and corners for tape; check compound coverage.

Quantities to confirm

Drywall purchase sheet

Planning quantityAmount

4 × 8 ft drywall sheetsWall and ceiling area with 10% waste / 32 sq ft; round up to whole sheets.: 22sheets
Drywall screws32 screws per purchased sheet is a planning allowance; confirm fastening schedule and package count.: 704screws
Joint compound, 5 gal planning bucketsInstalled area / 200 sq ft per bucket, rounded up; verify the actual product and finish level.: 4buckets
Joint tapeMeasure seams and inside corners from the sheet layout; area alone does not determine tape length.: Confirmlinear ft

What this estimate assumes

Panel thickness/type and fasteners depend on the assembly. The 32-screws/sheet and 200-sq-ft/bucket allowances are planning assumptions, not specifications. Tape needs a seam layout.

Name your project & add notes Optional

Project name Measurements, product details or questions

Paper size

Includes your quantities, assumptions and space to record the supplier, confirmed quantity, quote and delivery. No account required.

How to check this list before buying

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One total for walls and ceiling

The example combines 468 + 168 = 636 sq ft before waste. Adjust these surface areas for your actual room and layout.

Sheet thickness and type, fasteners, and finish requirements come from the assembly specification. The area calculation does not determine tape length: measure seams and inside corners separately. Screws and compound remain planning allowances.

Record those product choices and outstanding quantities in the purchase PDF.