Drywall Calculator
Calculate drywall sheets needed for walls and ceilings including waste.
Room Dimensions
10% standard, 15% complex rooms
~$13–18 for 1/2", ~$18–25 for 5/8"
Sheets Needed
19
4×8 ft sheets (incl. 10% waste)
Wall + Ceiling Area
541 sq ft
Area with Waste
595 sq ft
Sheet Size
32 sq ft
Total Sheets
19 sheets
Estimated Material Cost
$285
19 sheets × $15/sheet · labor not included
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Frequently Asked Questions
What size drywall sheets should I buy?
Standard drywall comes in 4×8 ft (32 sq ft) sheets. 4×12 ft sheets reduce seams in taller walls. 5/8-inch type X is required for fire-rated walls; 1/2-inch is standard for most interior walls.
How much waste should I add for drywall?
Add 10–15% waste for typical rooms. Complex rooms with many windows, doors, or angles may need 15–20% extra. Always round up to full sheets.
How much does drywall installation cost?
Drywall installation runs $1.50–$3.50 per square foot installed, including materials and labor. A typical 12×12 room costs $500–$1,500. Finishing and painting add another $1–$3/sq ft.