How Many Drywall Sheets Do I Need?

The Quick Answer: Drywall Sheets for Your Wall

For a single wall measuring 6m long × 2.5m high, you need 6 standard drywall sheets (1200×2400mm). Here's the full calculation and everything else you need to order alongside the sheets.

The Calculation Step by Step

Step 1: Calculate wall area

• Wall area = Length × Height
• 6m × 2.5m = 15 m²

Step 2: Divide by sheet area

• Standard sheet: 1200mm × 2400mm = 2.88 m²
• 15 ÷ 2.88 = 5.21 sheets

Step 3: Round up

• Always round up to whole sheets: 6 sheets

Step 4: Add waste

• For a simple single wall with no openings, 6 sheets is sufficient
• If the wall has a door or window, still buy 6 sheets (you cut around the opening)

Quick Reference: Sheets Per Wall Length

For standard 2.5m ceiling height with 1200×2400mm sheets:

Full Room Calculations

To drywall an entire room, calculate all four walls:

These counts include approximately 5% waste. Add 1-2 sheets if the room has many doors or windows (more cuts mean more waste).

Why You Don't Subtract Openings

With paint, you subtract doors and windows to avoid buying excess. With drywall, you typically do not subtract openings because:

• Sheets must be full-size for structural integrity — you can't splice small pieces together
• Each door or window opening requires cutting from a full sheet
• The cutout pieces above doors and below windows are awkward sizes that come from the main sheet
• The offcuts may be usable elsewhere, but you still need the full sheet to create them

Exception: If a wall has a very large opening (like a double garage door spanning 5m), you can reduce your sheet count for that section, since the area above the door is a separate, smaller section.

Materials Shopping List

For each sheet of drywall, you also need these materials. Here's a comprehensive order list based on sheet count:

Simplified shopping list for 16 sheets (standard bedroom):

• 16 drywall sheets (12.5mm × 1200 × 2400mm)
• 1 box drywall screws (500-pack, 35mm)
• 1 roll joint tape (50m roll)
• 2 buckets joint compound (25kg each)
• Corner bead as needed
• 3-4 sheets sandpaper (120-150 grit)

Sheet Layout Planning

Before you buy, plan how sheets will be arranged on each wall:

1. Start from one corner and work across the wall
2. Install horizontally — the long edge runs left-to-right
3. Stagger joints — if using two rows of sheets, offset the vertical joints by at least 600mm
4. Full sheets at eye level — put cut pieces at the top or bottom where they're less visible
5. Bridge openings — run a full sheet across a door or window opening, then cut out the shape

This planning often reveals that you can reuse offcuts more efficiently. For example, the piece cut from above a door on one wall may fit perfectly below a window on another wall.

How to Cut Drywall

Drywall is easy to cut with basic tools:

• Straight cuts — Score the paper face with a utility knife and straightedge, snap the board along the score, then cut the back paper
• Openings (doors/windows) — Mark the outline, cut straight lines with a utility knife, and use a drywall saw for the cuts you can't snap
• Circular holes (pipes, outlets) — Use a drywall saw, hole saw, or oscillating multi-tool
• L-shaped cuts — Score and snap one direction, saw the other

No power tools are strictly necessary, though a drywall screw gun (€40-80) makes fastening dramatically faster and prevents driving screws too deep.

Ordering and Delivery Tips

• Order all sheets at once — Drywall is heavy and awkward. Minimise handling by getting one delivery.
• Check for damage — Inspect sheets on delivery. Reject any with broken corners or crushed edges.
• Store flat — Stack sheets flat on a dry, level surface. Never lean them against a wall for more than a few minutes — they'll bow.
• Let them acclimate — If stored in a cold garage, move sheets into the room 24 hours before installation to reach room temperature and humidity.

When to Hire a Professional

Hanging drywall is manageable for DIYers, especially with a helper. However, if you're drywalling an entire house, working with high ceilings (above 3m), or need a smooth Level 4-5 finish for living areas, the time and skill savings from hiring a professional are well worth the investment. Use our quote tool to get competitive prices from local contractors.