Drywall calculator

Enter the wall and ceiling areas you plan to cover. Get a 4×8 sheet estimate, review the screw and compound allowances, and save a purchase PDF.

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

Your session draft

Example values are shown. Your edits will be saved automatically in this tab.

One draft per material, for this browser session. No account or sync.

Start with your measurements

Size up your project

Check the values below against your project measurements. They start with an example or your restored session draft.

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.: 19sheets
Drywall screws32 screws per purchased sheet is a planning allowance; confirm fastening schedule and package count.: 608screws
Joint compound, 5 gal planning bucketsInstalled area / 200 sq ft per bucket, rounded up; verify the actual product and finish level.: 3buckets
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

These are example quantities. Enable JavaScript to change inputs and download your PDF.[data-purchase-download],.purchase-method,.project-details,.purchase-download{display:none!important}

Area estimates and layout quantities

A 4×8 ft sheet has 32 sq ft of face area. The calculator adds your waste allowance and rounds up to whole sheets. This is an area estimate; the actual layout determines cuts, seams, and usable offcuts.

Joint tape stays unquantified until you measure seams and inside corners from that layout. Screws and compound are separate planning allowances, not a fastening specification or a verified product yield. Confirm sheet type and thickness, fastening requirements, finish level, and package coverage for your assembly.

Record the chosen products and open items on your purchase sheet before buying.