INTERIOR PROJECT CALCULATOR
Drywall Calculator
Turn wall and ceiling measurements into the number of drywall sheets to buy, with openings and a waste allowance you can see.
Build your estimate
HOW IT WORKS
Sheets you can account for.
TapeToCart separates the surface you measured, the openings you removed, the waste allowance you chose, and the whole sheets you have to buy.
How the calculation works
In room mode, wall area is the room perimeter multiplied by the wall height, and ceiling area is length multiplied by width. Openings are subtracted, then the waste allowance is added.
Wall area = 2 × (length + width) × wall height
Sheets = area to cover ÷ sheet area, rounded up
Because sheets cannot be split, the sheet area you buy is usually a little more than the area to cover. The difference is shown as extra coverage.
Before you order
Confirm which board type your project needs. Wet areas and some locations, such as walls between a garage and living space, can require moisture-resistant or fire-rated board under local code.
Check the board thickness and the sheet length that suits your wall height and ceiling layout, and plan how the sheets will fit through doors and stairways.
Joint compound, tape, screws, and corner bead are not included in this estimate.
Sources and assumptions
Sheet areas are the nominal sheet dimensions multiplied together: 4 ft × 8 ft = 32 ft², 4 ft × 10 ft = 40 ft², and 4 ft × 12 ft = 48 ft².
Openings are subtracted exactly as you enter them. We do not assume standard door or window sizes.
The waste allowance is a planning margin you choose, and it is shown in every result.