Drywall Calculator
Enter your wall and ceiling dimensions to see how many drywall sheets to buy — with 10% waste included, compared across 4×8, 4×10 and 4×12 sheets, plus screw and joint-compound estimates.
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Drywall sheets (incl. 10% waste)
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How many sheets of drywall do I need?
Add up every wall's length × height, plus the ceiling if you're hanging it, then divide by the sheet's area and add 10% for cuts around doors, windows and outlets. Longer 4×10 and 4×12 sheets mean fewer seams to tape but are heavier to handle solo. Figure about 32 screws per sheet and roughly 0.053 lbs of joint compound per square foot for a full three-coat tape job.