Drywall Sheet Calculator
Take off a hang in one pass: total wall and ceiling area plus a waste factor, divided by the sheet size you plan to hang, rounded up to whole sheets — with the consumables that ride along on every board: screws by the pound, joint tape by the foot, and taping-stage compound by the gallon. Sheet areas are exact geometry; the consumable rates are typical planning figures and the page labels them that way. Free, no login.
Wall & Ceiling
Materials
Screws/tape/mud are typical taping planning figures (≈320 ft²/lb screws, ≈0.5 lf/ft² tape, ≈0.5 gal/100 ft² taping mud); finish level changes mud usage.
Drywall — Material Order Sheet
Prepared with NORDIX — nordixhq.com/tools/drywall-calculator
Area: 1200 ft² (walls + ceilings) · Sheet: 4×12 (48 ft²) · Waste: 10%
| Line item | Quantity | Notes |
|---|---|---|
| Drywall sheets — 4×12 (48 ft²) | 28 sheets | Incl. 10% waste |
| Drywall screws | 4.1 lb | ≈320 ft²/lb — depends on screw size and framing spacing |
| Joint tape | 660 lf | ≈0.5 lf/ft² — tracks sheet layout, not area alone |
| Joint compound (taping) | 6.6 gal | Taping only — finish level changes mud usage |
Screw, tape, and compound rates are typical planning figures, not spec values — usage varies with framing spacing, sheet layout, and finish level (see the joint compound calculator for level-based mud). Confirm against the product spec before ordering.
How this calculator works
sheets = ⌈area × (1 + waste%) ÷ sheet ft²⌉ · screws ≈ area ÷ 320 lb · tape ≈ 0.5 lf/ft² · mud ≈ 0.5 gal/100 ft²
The sheet math is exact geometry — a 4×8 is 32 ft², a 4×12 is 48 ft², and the count rounds up. The three consumable rates are empirical planning figures: screws at ≈320 ft² per pound depend on screw size and framing spacing (roughly 32 screws per 4×8 sheet at 16" o.c.), tape at ≈0.5 lf/ft² tracks sheet layout rather than area alone, and the ≈0.5 gal/100 ft² compound figure is the taping stage only — finish level changes total mud dramatically, which is why the joint compound calculator prices mud by level. Confirm rates against the product spec on commercial work.
Worked example
1,200 ft² of walls and ceilings hung with 4×12 sheets at 10% waste:
- Adjusted area: 1,200 × 1.10 = 1,320 ft²; sheets: 1,320 ÷ 48 = 27.5 → 28 sheets.
- Screws: 1,320 ÷ 320 = 4.1 lb; tape: 1,320 × 0.5 = 660 lf.
- Taping compound: 1,320 ÷ 100 × 0.5 = 6.6 gal — taping stage only, before finish coats.
Enter the same job above (1,200 ft², 4×12, 10%) to reproduce it.
Reference: sheet sizes compared
Sheet areas (exact) and the count for 1,000 ft² of surface at 10% waste, computed by the same engine. Bigger sheets mean fewer butt joints to tape — usually worth the handling on long walls.
| Sheet | Area | Sheets per 1,000 ft² (10% waste) |
|---|---|---|
| 4×8 | 32 ft² | 35 |
| 4×9 | 36 ft² | 31 |
| 4×10 | 40 ft² | 28 |
| 4×12 | 48 ft² | 23 |
Frequently asked questions
How do I calculate how many sheets of drywall I need?
Measure total wall and ceiling area in square feet, add a waste factor, and divide by the area of one sheet — a 4×8 is 32 ft², a 4×9 is 36 ft², a 4×10 is 40 ft², a 4×12 is 48 ft². Round up to whole sheets, which is exactly what this calculator does. For walls, length × height per wall; for ceilings, length × width of the room.
Should I subtract doors and windows from the drywall area?
Usually no for standard openings. The pieces you cut out around a door or window are rarely reusable elsewhere, so most estimators run drywall takeoffs at gross wall area and let the openings act as part of the waste allowance. Deduct only large openings — garage doors, storefront glass, open archways — where a full sheet or more genuinely drops out.
What waste factor should I use for drywall?
10% is the common default for typical rooms, and it's this calculator's starting value. Go higher — 15% or more — for chopped-up floor plans, angled walls, stairwells, and rooms where ceiling heights force awkward rips; simple large rectangular rooms hung with 12-ft sheets can come in under 10%. Waste factors are estimates, so track what your crews actually burn and adjust.
How many screws do I need per sheet of drywall?
Roughly 32 screws per 4×8 sheet with framing at 16 in. on center — screws about every 12 in. in the field and closer at edges per the fastening schedule you're working to. This calculator carries screws by weight at about 1 lb per 320 ft² of board, which is a typical figure for 1-1/4 in. coarse-thread screws; ceilings and 12 in. o.c. fastening use more.
What size drywall sheet should I use?
4×8 is the standard and the easiest to handle; 4×12 sheets mean fewer butt joints to tape on long walls, which saves finishing labor if you can get them into the room. 4×9 sheets exist specifically for 9-ft ceilings so you can hang walls without a horizontal seam, and 4×10 covers 10-ft walls the same way. Fewer joints is almost always worth the harder handling on commercial work.
Does this calculator include mud and tape?
Yes — it carries tape at about 0.5 linear feet per square foot of board and joint compound at about 0.5 gallon per 100 ft², which are typical taping-stage quantities. Total mud depends heavily on the finish level: a Level 5 skim coat uses far more than a Level 3 texture job. Use the joint compound calculator to price the mud by finish level.
Method: sheets from adjusted area ÷ sheet area (exact geometry, rounded up); screws, tape, and compound at typical planning rates (≈320 ft²/lb, ≈0.5 lf/ft², ≈0.5 gal/100 ft² taping stage) — empirical figures that move with framing spacing, sheet layout, fastening schedule, and finish level, so confirm against the spec before ordering. Standard-opening deductions are usually left in as waste; deduct only large openings where full sheets genuinely drop out. Fire-rated, moisture-resistant, and ceiling-specific board are product-selection questions this count does not decide.
Pair with the Joint Compound Calculator to price the mud by finish level, the Paint Coverage Calculator for the coats that follow, or the Square Footage Calculator to build the wall-and-ceiling area first.