Estimated result
Enter measurements and select Calculate.
Room and direct-area modes
Room mode uses perimeter × wall height, subtracts entered openings, and optionally adds ceiling area. Direct mode accepts a known surface area. Allowance is applied before dividing by sheet area and rounding up.
Sheet-count boundary
Common sheet dimensions are editable. This does not optimize layouts or estimate compound, screws, tape, framing, labor, fire ratings, or code requirements.
Worked example
Enter the example values shown in the calculator to review every intermediate area, allowance, and rounded purchase quantity.