Drywall Calculator
Estimate drywall sheets needed for walls and ceilings
Enter Room Dimensions
How to Use This Calculator
- Measure the length and width of your room
- Measure the wall height (typically 8 feet)
- Select your drywall sheet size
- Choose a waste factor (10% is standard)
- Click Calculate to get materials needed
Formula
Drywall calculation formula:
Wall Area = Perimeter × Height
Ceiling Area = Length × Width
Sheets = (Total Area × (1 + Waste)) / Sheet Size
Tips for Accurate Measurements
- Hang drywall perpendicular to studs for strength
- Stagger seams to avoid long continuous joints
- Use a drywall lift for ceiling installation
- Apply three coats of joint compound for smooth finish
- Sand between coats for professional results
Frequently Asked Questions
What size drywall sheets should I use?
4x8 sheets are standard and easiest to handle. 4x12 sheets reduce seams but are heavier. Use 1/2" thickness for walls, 5/8" for ceilings.
How much waste should I factor in?
10% waste is standard for rectangular rooms. Add 15-20% for rooms with many corners, angles, or openings.
How many screws do I need per sheet?
Use screws every 12 inches on walls, 8 inches on ceilings. A typical 4x8 sheet needs 32-40 screws. One pound of screws is about 150-200 screws.
Can I install drywall myself?
Yes, but it requires proper tools (drywall lift for ceilings, T-square, utility knife). Taping and finishing joints takes practice for smooth results.
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Calculator by Build Calculators Team | Construction Calculator Specialists
Last updated: January 2025