Calculator guide
Estimate drywall sheets and fasteners from room dimensions and sheet size.
Formula or method
Wall area = perimeter × height; ceiling area = length × width; sheets = total area ÷ sheet area, rounded up.
How to use this calculator
- Enter room length, width, and wall height.
- Select sheet dimensions and subtract major openings if supported.
- Round sheets up and review screws or joint-material estimates.
Worked example
A 12×10 ft room with 8 ft walls has 352 ft² of walls plus 120 ft² ceiling =472 ft²; with 32 ft² sheets, 472/32=14.75, so buy at least 15 before waste.
Understanding the result
Cut layout and damage make the rounded count a starting point; a contractor may optimize sheet orientation.
Limitations and assumptions
- Does not fully account for doors, windows, soffits, fire ratings, or staggered joints.
- Fastener counts depend on framing spacing and local code.
Frequently asked questions
Should I buy extra sheets?
A modest waste allowance is common, especially for rooms with many openings.
Are moisture-resistant boards always needed?
Use products required by the location and local code, not just the estimate.
Does this price installation?
No; labor, tape, compound, and finishing are separate.
Sources
Educational information only; verify important decisions with a qualified professional.