Material calculator
Drywall calculator — sheets, mud & tape
Estimate drywall sheets plus approximate joint compound, tape, and screws from total board area. Sheet count is solid; finishing materials vary by finish level.
You'll need
35 sheets
Drywall sheets
- Joint compound
- 140 lb
- Joint tape
- 500 linear ft
- Drywall screws
- 1,000 screws
What this assumes
- 1000 ft² board area, +10% sheet waste, ÷ 32 ft² per sheet.
- Joint compound uses about 140 lb per 1,000 ft²; tape uses about 0.5 linear ft per ft²; screws use about 1 per ft².
Coverage rates & sources
Every number this calculator uses is a published engineering constant — not an estimate we made up. Here is exactly what it assumes and where each value comes from.
- 4×8 drywall sheet coverage: 32 ft²/sheetSource: Geometry (4 ft × 8 ft); standard residential size
- 4×12 drywall sheet coverage: 48 ft²/sheetSource: 4 ft × 12 ft
- Drywall waste allowance: 10%Source: Standard; 15–20% for many corners/cathedral ceilings (industry estimating guidance)
- Joint compound: ~140 lb / 1000 ft²Source: USG/industry rule of thumb for taping + 3 coats (varies with finish level)
- Joint tape: ~0.5 lin ft / ft² boardSource: Industry rule of thumb (paper tape)
- Drywall screws: ~1 screw / ft²Source: Field + edge fastening at 12"/16" o.c.
Before you buy
- Sheet count is reliable, but mud, tape, and screw figures are planning rules of thumb that vary with finish level.
- A Level 5 smooth finish uses much more compound than a garage or utility-room finish.
- 4×12 sheets mean fewer joints but usually need two people to hang; moisture-resistant board is a different product with the same coverage.
This is a planning estimate, not a substitute for a pro's on-site measurement. For load-bearing, structural, or code-regulated work, confirm quantities with a licensed contractor.
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