Rectangular room
Walls = 2 × (length + width) × height
The ceiling adds length × width only when you include it. The floor is never counted.
How it works
How your surfaces become a sheet estimate.
We total the selected walls and ceilings, subtract only the large openings you choose, then apply the panel size and whole-sheet rounding.
Measured area
Measured area = gross area − large openings
Multiple-surface mode adds width × height × quantity for every complete row.
Order area
Order area = measured area × (1 + allowance %)
The allowance starts at 0% and changes only when you edit it.
Sheet count
Sheets = round up(order area ÷ panel area)
Only the purchase count is rounded up; the area calculations keep full precision.
Before you buy
What this estimate assumes
- Entered walls, ceilings, and openings are rectangular and do not overlap.
- Openings remain included by default because typical doors and windows can help account for cuts and offcuts.
- No extra material is added by default. Choose an allowance that fits the cuts, irregular surfaces, and spares in your project.
- The sheet count is based on area only and does not optimize layout, seams, orientation, or offcut reuse.
- Choose the drywall type and thickness required for your project separately. This calculator estimates panel quantity, not code or assembly requirements.
Confirm your panel before ordering
The US presets cover common four-foot-wide panel lengths. Products, thicknesses, edge profiles, and availability vary, so use the actual panel dimensions and specifications for your project.
Manufacturer literature is useful for confirming available dimensions and product requirements. Measivo does not select a drywall type, thickness, or code-compliant assembly.
Manufacturer references
Related calculators
Keep planning your project.
Use another Measivo calculator to estimate the next material on your list.