Calculate drywall sheets, compound, tape and screws for a room.
Sheets are whole units so the result is always rounded up, and waste covers cuts around openings that cannot be reused. Compound, tape and screws all scale with boarded area rather than sheet count. Only large openings are worth deducting: subtracting every small window leaves too little material once offcuts are discarded.
Drywall
Sheets = net area × (1 + waste) ÷ sheet area
Sheets = net area × (1 + waste) ÷ sheet area Sheets are whole units so the result is always rounded up, and waste covers cuts around openings that cannot be reused. Compound, tape and screws all scale with boarded area rather than sheet count.
Only large openings are worth deducting: subtracting every small window leaves too little material once offcuts are discarded.
This calculator takes 5 inputs: Wall area, Ceiling area, Area per sheet, Openings to deduct, Waste allowance. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.