How many drywall sheets you need
Sheet count is sheets = ceil(wall area ÷ sheet area). A standard 4 × 8 ft sheet covers 32 sq ft, so 640 sq ft needs 20 sheets. A 4 × 12 ft sheet covers 48 sq ft. Wall and ceiling areas come from the square footage calculator.
How to use this calculator
Enter the total wall area (and ceilings if drywalling them) and the sheet size in square feet. The result rounds up to whole sheets. After hanging, the paint calculator sizes your finish coats. Sheets need to land on framing, so check spacing in the stud calculator.
Buy a few extra
Add about 10% for cuts, breakage and waste around openings. Larger sheets mean fewer seams but are harder to handle solo. For exterior masonry instead of drywall, see the brick calculator.
Plan the layout as well as the count. Hanging sheets horizontally on a standard 8 ft wall leaves one long seam at chest height that is far easier to tape than several vertical joints, and it wastes less on long runs. Order the right board too: 1/2 inch is standard for walls, 5/8 inch fire-rated board is often required on garage ceilings and shared walls, and moisture-resistant board belongs behind tile and in bathrooms. Sheets are heavy and awkward overhead, so plan a helper or a panel lift for ceiling work.
Frequently asked questions
- How do I calculate drywall sheets?
- Divide total wall area by the area of one sheet and round up. A 4 × 8 ft sheet is 32 sq ft.
- What size are drywall sheets?
- Common sheets are 4 × 8 ft (32 sq ft) and 4 × 12 ft (48 sq ft). Enter the coverage in square feet.
- Should I include the ceiling?
- Yes, if you are drywalling the ceiling, add its area to the wall area before dividing.
- How much extra should I buy?
- About 10% to cover cuts, breakage and waste around doors and windows.
- How much joint compound and tape will I need?
- Budget roughly one gallon of ready-mixed compound and about 40 linear feet of tape per 100 square feet of drywall for a three-coat finish. Textured or level-5 finishes use noticeably more.