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Drywall Sheet Calculator

Calculate drywall sheets and materials needed
Enter room dimensions to calculate drywall needed for all 4 walls.
Typical: 10-15%
Standard: 21 sq ft each
Standard: 15 sq ft each

Enter room dimensions to calculate drywall sheets needed.

Drywall Calculator Guide

How to Calculate Drywall

1. Measure Your Room

Measure length, width, and height of the room. For walls only, you'll need all 4 wall areas.

2. Choose Sheet Size

Standard: 4'×8' (32 sq ft)
Longer: 4'×10' (40 sq ft) or 4'×12' (48 sq ft)

Longer sheets reduce seams but are harder to handle.

3. Add Waste Factor

Typical waste: 10-15% for cuts, mistakes, and odd shapes.

4. Account for Openings

Subtract doors and windows to avoid over-ordering.

Material Estimates

  • Screws: ~32 per sheet (12" spacing on 16" studs)
  • Joint Compound: ~0.053 gal per 100 sq ft
  • Joint Tape: ~370 ft per 1000 sq ft
Pro Tips
  • Orientation
    Hang sheets horizontally for fewer seams and stronger walls.
  • Thickness
    1/2" for walls, 5/8" for ceilings or fire-rated applications.
  • Stagger Seams
    Offset seams between rows for better strength.
Sheet Sizes
  • 4' × 8': 32 sq ft (most common)
  • 4' × 10': 40 sq ft
  • 4' × 12': 48 sq ft

Drywall Calculator

Calculate exactly how many drywall sheets you need for your project, plus all the materials for finishing!

Standard Sizes
Thickness 1/4", 3/8", 1/2", 5/8"
Width 4 feet (standard)
Length 8', 10', 12', 14', 16'
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Drywall Installation:

Did You Know?

Drywall was invented in 1916 as a time-saving alternative to traditional plaster walls. It revolutionized construction and is now used in over 95% of new homes!