Enter room dimensions and sheet size to estimate how many drywall sheets you need, with a waste allowance for cuts and damaged sheets.
Enter your project dimensions and click Calculate to see your estimate.
Typical materials for a drywall project
Sheet counts are a planning estimate. Add waste for cuts around openings and damaged sheets.
Drywall sheets are estimated from total wall surface area divided by sheet size. A waste factor covers cuts around openings and damaged sheets.
Results are planning estimates based on typical assumptions. Verify quantities with product labels and your project layout before purchase. How we calculate
Calculate wall area from room perimeter times wall height, then divide by your sheet size (for example, 32 sq ft for a 4×8 sheet). The calculator adds waste and rounds up to whole sheets.
4×8 sheets are standard and easiest to handle. 4×12 sheets reduce seams on long walls but are heavier and harder to maneuver in tight spaces.
Add 10% for simple rectangular rooms and 15% for rooms with many doors, windows, or soffits. Always round up to whole sheets.
This tool estimates wall surface area from room perimeter and height. Add ceiling square footage separately if you plan to drywall the ceiling.
No. This calculator uses gross wall area. Your waste percentage typically covers standard opening cuts, but very large openings may need a higher waste factor.
No. Sheet count only. Joint compound, tape, and screws depend on seam length and install method — order those separately.
Drywall Sheet Size Guide
Compare 4×8, 4×10, and 4×12 sheet sizes — coverage, waste factors, and when each size makes sense for your project.
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