Drywall calculator
Enter the room's size and pick a sheet size. Openings are not subtracted, because the offcuts rarely get reused.
Your estimateEstimate
- Board area
- 528 ft²
- With extra
- 581 ft²
- Screws (about 1 per ft²)
- 590
Sheets19
How it is calculated
Area = 2 × (length + width) × height, plus length × width for the ceiling. Sheets = area with extra ÷ sheet area, rounded up.
Screws: about one per square foot of board, which is about 32 for a 4 × 8 sheet.
Worked example
With the starting values shown in the form, the result is 19 (sheets). Change any number and the estimate updates as you type.
Tips
- Longer sheets mean fewer joints to tape and finish.
- Use moisture-resistant board in bathrooms and laundry rooms.
Questions
- How many sheets of drywall for a 12 × 12 room?
- With 8 ft walls and the ceiling, 528 ft². With 10% extra that is about 581 ft², or 19 sheets of 4 × 8.
- Should I subtract doors and windows?
- For small openings, no. The pieces you cut out are usually waste, so counting the full wall keeps you from running short.
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