Free Tool
Free drywall calculator
Enter the room size and get the sheets, joint compound, and screws you need, with waste built in. Pick your sheet size and the math handles the rest. Free, no signup.
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Sheets, mud, and screws in one shot
The sheet count is the number that matters, and it is easy to guess low once you factor in cuts and waste. This adds a 10 percent allowance and rounds up.
Bigger sheets mean fewer seams to tape and a cleaner finish, so use 4 by 12 where you can handle them. The tool lets you switch sizes and see the count change.
It also gives you the joint compound and screws. Figure screws every 12 inches in the field and 8 inches on the edges, and two to three coats of compound over the tape. Order a little extra mud. It is cheap, and running out mid-coat stops the whole job.
Questions
How many drywall sheets do I need?
Take the wall and ceiling area, add about 10 percent for waste, and divide by the sheet coverage. The calculator does it and rounds up.
What size drywall sheet is best?
Bigger sheets leave fewer seams, so 4 by 12 gives the cleanest finish if you can move them. 4 by 8 is easier to handle solo.
Is this really free?
Yes. No email, no signup, and nothing you type leaves your browser.
Turn the takeoff into a priced estimate
Werx takes your quantities and builds a branded estimate and proposal in one step, then tracks the real cost as you hang and finish. 14-day free trial, no credit card.
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Disclaimer: These free tools and templates are provided for general information and estimating purposes only. All results — including quantities, material and cost estimates, load, sizing, and span figures, scores, and any guidance or warnings — are rough approximations that may not fit your specific project, site conditions, local building codes, or current prices. They are not engineering, architectural, structural, legal, financial, or other professional advice, and are not a substitute for a licensed engineer, architect, contractor, or other qualified professional. Always confirm quantities, sizing, and structural, electrical, mechanical, and code requirements with a licensed professional and your local authority having jurisdiction before purchasing materials or performing any work. Werx makes no warranty as to accuracy and accepts no liability for any decision made using these tools. Use at your own risk. See our Terms of Service.