Drywall Calculator

Estimate drywall sheets, screws, and joint compound for a room or wall.

Total wall perimeter (ft)

Wall height (ft)

Sheet length (ft)

Sheet width (ft)

Openings to subtract (sq ft)

Waste allowance (%)

Sheets needed

Last updated: 2026-08-30

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FAQ

What sheet size should I buy?

4×8-foot sheets are the standard; 4×12 sheets mean fewer seams but need help to handle and a bigger vehicle.

How much waste should I add?

Ten percent covers cuts and breakage for simple rooms; add more around many doors, windows, or angled ceilings.

How is compound estimated?

As a rule of thumb, one box of all-purpose compound covers roughly 100 square feet of finished surface.

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