Drywall & Plasterboard Calculator

Construction Calculators

Calculate exact drywall boards, screws, joint tape, and compound required for your project.

Project Settings

10%
0%25%

Rooms & Spaces

Total Boards Needed

16

Net Area: 45.10 m²

Screws
542 pcs
Joint Tape
58.6 m
Joint Compound
15.8 kg
Net Area: A = Σ( L × H ) + Ceiling - Doors & Windows
Boards: N =
A × (1 + Waste) Board Area
Metric System
  • Screws: ~12 pcs per m²
  • Joint Tape: ~1.3 m per m²
  • Joint Compound: ~0.35 kg per m²

Imperial System (US)
  • Board Size: 4x8 ft (32 sq ft) or 4x12 ft (48 sq ft)
  • Screws: ~1.15 pcs / sq ft
  • Joint Tape: ~0.37 ft / sq ft
  • Joint Compound: ~0.1 lbs / sq ft

What is Drywall & Plasterboard Calculator?

Calculate exact drywall boards, screws, joint tape, and compound required for your project. This tool prevents expensive material waste and multiple trips to the hardware store. Start by selecting your preferred measurement system using the Metric or Imperial toggle. In the Project Settings, define the Board Type, Board Size, and your installation Orientation. Use the Waste Margin slider to account for complex offcuts. Under Rooms & Spaces, lay out your project by inputting the Length, Width, and Height in meters or feet. You can check Include Ceiling to cover the overhead area and deduct structural openings by indicating the number of Doors and Windows. The dashboard will instantly output the Total Boards Needed, alongside the precise count of SCREWS, length of JOINT TAPE, and weight of JOINT COMPOUND.
Practical Calculation Example
A homeowner in Texas is framing and finishing a new basement extension. They set the calculator to the Imperial system to work seamlessly with their local supplier's measurements. They use the Rooms & Spaces section to input the dimensions in feet for the new media room, explicitly adding 1 door and 2 egress windows to avoid over-ordering. Because the ceiling design includes intricate angled cuts around HVAC ducts, they bump the Waste Margin up to 15%. The system calculates exactly 32 boards, 1100 screws, and 38 lbs of joint compound. The homeowner clicks Copy Material List and orders the entire inventory directly from their local hardware store.
Reference Zones
Interface Element Construction Function Practical Application
Metric / Imperial Unit Standardization Seamlessly switches all calculations and outputs between meters/kilograms and feet/pounds.
Waste Margin Buffer Planning Prevents material shortages caused by cutting errors, fragile corners, or angled walls.
Include Ceiling Spatial Coverage Automatically adds the roof area based on the floor dimensions you provided.
Copy Material List Procurement Exports the required boards, screws, tape, and compound directly to your clipboard.

History and Origin

Augustine Sackett invented "Sackett Board" in 1894, the original ancestor of modern drywall, looking for a way to substitute heavy, slow, and labor-intensive traditional lath and plaster. By the mid-20th century, the post-World War II housing boom in the United States cemented drywall as the absolute standard for rapid residential construction, standardizing imperial measurements like the classic 4×8 foot board.

Frequently Asked Questions

How accurate is this Drywall & Plasterboard Calculator tool?

Our tools utilize high-precision floating point math guaranteeing accuracy up to the 6th decimal place.

Is this free to use?

Yes, all converters and calculators on ToolsMetrics are 100% free with no limits.

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