Government of Canada, Department of Justice
Canadian SI, yard, foot, inch, area and volume unit definitions
Version: current-to-2026-06-14CanadaR.S.C., 1985, c. W-6; page current to 2026-06-14Source-backedLast reviewed: 2026-08-01
Arithmetic resultCanada-wide arithmetic
Drywall Materials Calculator
Estimate drywall sheet quantities from wall, ceiling and opening measurements without product or code claims.
Free tool — no sign-up needed. Your numbers stay on this device until you export or share them.
My plan
My renovation plan · Toronto, Ontario
Nothing saved yet — work stays private in this browser
01 · Project measurements
Adjust the inputs and the result updates immediately.
Example numbers — replace them with your room.
Result updated: Total sheets, 19
02 · Planning result
Source-backed methodTotal sheets
19
Gross wall area
35.67 m²
Openings deducted
0 m²
Net wall area
35.67 m²
exact size, no waste added
Ceiling area
13.38 m²
Net coverage
49.05 m²
exact size, no waste added
Order area
53.96 m²
includes your waste allowance — order this much
Area per sheet
2.97 m²
Wall sheets
14
Ceiling sheets
5
More actions
Private web sharing: Available after secure cloud save is released
Assumptions
These are part of the result, not fine print.
- Entered sheet size: 1.2192 m × 2.4384 m
- Editable waste allowance: 10%
What this result does not decide
- Corners, seams, board orientation and unusable offcuts can increase the real sheet count.
Planning information only. This is not a quote, code-compliance decision, structural recommendation, or substitute for site review.
How we calculate this
Official source
Orion Project Studio
Geometry-only material quantity calculation contract
Version: 1.0.0Canada1.0.0Source-backedLast reviewed: 2026-08-01
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