Drywall Calculator
Plan your interior finishing with precision. Calculate the number of drywall sheets and estimated costs for your wall and ceiling projects.
Input Dimensions
Calculation Results
How to Use the Drywall Calculator
Our drywall calculator simplifies the process of estimating sheets and materials for your interior finishing projects. Start by entering the total wall area in square meters that you plan to cover.
Next, select the sheet size you plan to use—standard sizes are 1.2m x 2.4m (4ft x 8ft). If you know the cost per sheet, enter it for a total price estimate. Click "Calculate Now" to see the total number of sheets required and the projected material cost for your project.
Pro Tips for Professional Drywall Installation
Plan for Waste
Drywall projects always involve waste due to offcuts. Add 10-15% to your sheet count, especially if your room has many windows, doors, or unusual architectural angles.
Stagger Your Joints
When installing drywall, avoid having four corners meet at one point. Staggering the vertical joints makes the wall structurally stronger and helps hide the seams after taping.
Frequently Asked Questions
How many sheets of drywall do I need for a 12x12 room?
For a standard 12ft x 12ft room (approx. 3.6m x 3.6m) with 2.4m high walls, you would typically need about 12 to 14 sheets of 1.2m x 2.4m drywall, depending on window and door placements.
What is the standard thickness for residential drywall?
The most common thickness for interior walls is 12.5mm (1/2 inch). For ceilings, a slightly thicker 15mm (5/8 inch) is often used to prevent sagging between the joists over time.
Can I use standard drywall in a bathroom?
It is not recommended for high-moisture areas. Use moisture-resistant drywall (often called "green board") in bathrooms and laundry rooms to prevent mold growth and water damage.