⬜Drywall Calculator PRO
Multi-room estimator with sheet types, finish levels, compound coats, corner bead, vapor barrier, and insulation.
Dimension Diagram — first room, updates as you type
Wall area comes from the perimeter × ceiling height, minus door and window openings. Ceiling adds length × width.
1 Rooms
6 mil poly sheeting — required in cold climates
Batt insulation — R-13 to R-30
2 Project & Pricing
Labour Cost
3 Material Breakdown
Project Totals
Results
Material Quantities
Coverage
Cost Breakdown
⚠️ Pre-Export Checklist
- Room dimensions verified on-site
- All openings accounted for (doors, windows, pass-throughs)
- Ceiling height confirmed (standard 8ft or custom)
- Fire-rated drywall needed? (check local code for garages/between units)
- Moisture-resistant board for bathrooms/basements/kitchens
- Vapor barrier required by code in your climate zone?
- Corner bead type confirmed (inside/outside/bullnose)
- Screw type matches stud material (coarse for wood, fine for metal)
How to Estimate Drywall for a Room
Show formulas, finish levels, and worked examples ▼
Formulas
Wall Area= Perimeter × Ceiling Height − Openings
Ceiling Area= Room Length × Room Width
Total Area= Wall Area + Ceiling Area
Sheets Needed= Total Area ÷ Sheet Area (32/36/48 sq ft) × (1 + waste%)
Screws= Total Area ÷ (spacing/12) × stud_count — typically 1 screw per 12" o.c. on each stud
Joint Compound= Total Area × coat_factor ÷ coverage_per_box
Tape= Total Area × tape_factor ÷ coverage_per_roll
Finish Levels (Gypsum Association GA-214)
- Level 0: No finishing — temporary or non-visible areas
- Level 1: Tape embedded in compound, no further coating — attic/Plenum spaces
- Level 2: One coat over tape — utilitarian areas (garage, warehouse)
- Level 3: Two coats over tape — areas to receive heavy texture or tile
- Level 4: Three coats over tape — standard residential walls under flat paint
- Level 5: Skim coat over Level 4 — critical lighting areas, gloss paint, or dark colors
Worked Example
12 ft × 10 ft room, 8 ft ceiling, 2 openings (21 sq ft each), Level 4 finish:
- Wall perimeter: (12 + 10) × 2 = 44 lin ft
- Wall area: 44 × 8 − 42 = 310 sq ft
- Ceiling area: 12 × 10 = 120 sq ft
- Total area: 310 + 120 = 430 sq ft
- Sheets (4×8): 430 ÷ 32 × 1.10 = 15 sheets
- Screws (12" o.c.): 430 ÷ 12 × 4 studs ≈ 516 screws
- Compound (Level 4, 3 coats): 430 × 1.5 ÷ 300 = 3 boxes
- Tape: 430 × 0.8 ÷ 400 = 1 roll
Sheet Types Guide
- 1/2" Standard: Most common for walls in residential construction
- 5/8" Fire Code (Type X): Required in garages, between dwelling units, and for 1-hour fire ratings
- Moisture Resistant (Green Board): Use in bathrooms, kitchens, laundry rooms, and basements
- Soundproof (QuietRock): Reduces sound transmission by up to 90% — ideal for home theaters, studios, shared walls
Common Mistakes to Avoid
- Forgetting to subtract door and window openings
- Not accounting for ceiling — walls only estimate
- Under-ordering compound — Level 4/5 requires significantly more
- Buying exact number without waste — always add 10%
- Using wrong screw type — coarse for wood, fine for metal studs
- Skip vapor barrier in cold climates — moisture leads to mold
Drag to rotate — Scroll to zoom
相关计算器
Frequently used together on the same project.
Client & Quote (prints on PDF & Excel)
Adjustments (applies to exports)
Contingency is added as a separate line on the exported cost summary. Waste % is printed as an advisory reminder.
Project notes (prints on PDF & Excel)
Result compare (A/B)
| Item | Pinned | Current | Change |
|---|---|---|---|
Saved rates auto-apply from your Price Library. Advanced details stay in your browser — nothing is uploaded except inside your own PDF/Excel exports.
估算干墙材料过去意味着猜测和剩余废料。我们的干墙计算器通过从房间尺寸计算精确的面板数量、接缝化合物重量、胶带长度和螺钉数量来消除浪费。输入墙壁长度、墙壁高度和是否包含天花板，计算器会自动考虑标准4x8、4x9或4x12面板尺寸，并减去窗户和门开口。
无论您是用8英尺墙壁完成地下室，用9英尺天花板装饰车库，还是在12英尺尖顶房间挂干墙，精确的材料数量可以防止昂贵的中途采购。典型的12x14英尺卧室需要大约10张4x8干墙板。接缝化合物覆盖率取决于您是应用Level 4还是Level 5饰面。
📖 如何使用干墙计算器
测量房间尺寸
分别测量每面墙的长度和高度。注意不规则高度的墙壁。
标记开口
记录每扇窗户和门的宽度和高度。
选择面板尺寸
选择4x8、4x9或4x12面板。
选择饰面等级
选择Level 3、4或5。更高等级需要更多接缝化合物。
包含或排除天花板
切换是否包含天花板。
审查材料清单
计算器输出面板、化合物、胶带和螺钉。多订10%作为损耗。
📐 干墙公式和覆盖率
板材面积：面积 = 长度 × 高度。 面板数：面板 = 总面积 / 面板面积（4x8为32）。 化合物：Level 4每100平方英尺需要约4.3磅。 胶带：每卷覆盖75英尺接缝。 螺钉：墙壁12英寸中心距，天花板8英寸中心距。
⚠️ 常见干墙错误
忘记减去开口
✓ 始终减去窗户和门。
只买胶带化合物
✓ 胶带仅占总量的30%。
螺钉长度错误
✓ 1/2英寸干墙使用1-5/8英寸螺钉。
忽略天花板螺钉间距
✓ 天花板需要8英寸中心距。
不考虑面板方向
✓ 水平悬挂接缝更少。
低估Level 5化合物
✓ Level 5需要33%更多化合物。
向下取整面板数
✓ 16.3张意味着订购17张。
💡 干墙安装专业提示
尽可能水平悬挂
薄层涂抹化合物
每层之间用120粒度打磨
交错面板边缘
底部留1/8英寸间隙
标记每张面板
多订10%
使用防潮板
❓ 干墙计算器 — 常见问题
约17张4x8，减去开口。
Level 4约0.6加仑。
Level 5在整个表面添加薄层涂层。
是，4x12面板和Level 4/5饰面。
约135个。
是，胶带用热泥，饰面用预混。
🏗️ 实际干墙项目
完成20x25英尺地下室需要38张面板和11加仑化合物。车库装饰需要45张。商业改造2000平方英尺需要约300张。
我们的干墙计算器为墙壁、天花板和房间提供精确的材料估算。获取面板、接缝化合物、胶带和螺钉的即时明细。
✅Method, Sources & Review
Maintained by theBuildingCalc methods desk· Last reviewedSeptember 23, 2026. This calculator implements the standards and references below; every figure can be rechecked against the formulas and worked example on this page.
Results are estimates, not engineering advice. Verify against local codes and licensed professionals for structural, electrical, and gas work. See ourTerms. Spotted an error? Report it— corrections ship with the next review.