Drywall Calculator
Estimate the number of drywall sheets, compound, and tape required for your interior finishing project. Professional planning for smooth walls.
Sheets Required
Joint Compound (Gal)
Tape (Feet)
Concept Overview
Drywall estimation involves calculating the total surface area of walls and ceilings then dividing by the area of a single gypsum sheet. Precise estimates reduce waste and help you purchase the correct amount of support materials like mud, tape, and screws.
Sheet Dimensions
Standard sheets are 4'x8' (32 sq ft). For large rooms or high ceilings, 4'x12' (48 sq ft) sheets are preferred to minimize joints and sanding effort.
Compound Yield
A typical estimate is about 0.05 gallons of joint compound per square foot, which allows for three standard coats over joints and screws.
Material Formula
Sheet Coverage Equation
Sheets = Total Area ÷ Sheet Area
Total area should include all walls and ceilings. Sheet area is 32 sq ft for standard 8-foot boards and 48 sq ft for 12-foot boards.
Levels of Finish
- Level 4: Standard residential walls
- Level 5: Skim coat for high-gloss paints
- Level 3: Heavily textured surfaces
- Level 0/1: Closets or temporary storage
The 15% Waste Rule
Always order 15% extra material. Drywall involves many cuts for outlets, windows, and corners. Circular off-cuts cannot be reused, making this waste factor critical for adequate supply.
Material Yield Estimates
Room Area (sq ft) 4x8' Sheets Screws (lb) 100 4 1 400 13 3 800 25 6 1200 38 9 Frequently Asked Questions