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Drywall Sheets Calculator
Estimate how many drywall sheets you need for a given wall and ceiling area.
Total area to cover
Sheet size
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How it works
Sheets = area × 1.1 ÷ coverage per sheet (rounded up)
Add the wall and ceiling areas, divide by a sheet’s coverage, and round up. The 10% waste factor covers cuts around windows, doors and corners. Larger sheets mean fewer seams to tape.
Worked example
800 ft² with 4×8 sheets is about 28 sheets after waste.
Frequently asked questions
What size sheet is best?
Bigger sheets (4×12) reduce seams and finishing time but are heavier and harder to handle solo.
Do I need more for ceilings?
Ceilings use the same coverage, but plan layout carefully — the 10% waste factor usually covers it.
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This calculator is for educational purposes. Double-check important results before acting on them.