ULTIMATE DIYER
Drywall Material Calculator
Enter the room length, width, and wall height. The calculator estimates drywall for all four walls only — the ceiling is not included.
Sheet Size / Orientation Comparison
| Sheet Size | Horizontal Buy | Horizontal Fit / Cutoff | 4-ft Cutoffs Reused | Vertical Buy | Vertical Fit / Cutoff | Best Orientation for Lower Sheet Count |
|---|---|---|---|---|---|---|
| 4 × 8 | — | — | — | — | — | — |
| 4 × 10 | — | — | — | — | — | — |
| 4 × 12 | — | — | — | — | — | — |
How horizontal cutoff reuse works: Small planned fillers are allowed. Small leftover scraps are not reused. For example, if a 12-ft wall needs 10 ft + 2 ft to complete a course, the calculator uses one full 10-ft sheet and can cut another 10-ft sheet into multiple 2-ft filler pieces. Any leftover scrap under 4 ft is treated as waste and is not carried forward for reuse.
Vertical placement: For a clean vertical layout, match panel length to wall height when practical: 8-ft panels for 8-ft walls, 10-ft panels for 9–10-ft walls, and 12-ft panels for 10–12-ft walls. Vertical cutoffs are shown, but they are not credited toward reducing sheet count because reusing them can add horizontal joints and extra finishing work.
Total Wall Area—sq ft
Approx. Drywall Screws—
Selected Layout—
Sheets to Buy—
This free calculator estimates four walls only. Ceiling drywall is not included. Doors and windows are not subtracted. Layout counts are planning estimates and do not account for framing changes, unusual openings, or every possible field-cutting strategy.