Drywall Calculator
Estimate how many drywall sheets you need for the walls (and optionally the ceiling) of a room.
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How it works
Wall area is the perimeter times ceiling height; add the floor area if you are drywalling the ceiling. Add 10% for waste, then divide by the square footage of your chosen sheet (a 4×8 sheet is 32 sq ft).
Formula
Sheets = ⌈(Wall area + ceiling) × 1.10 ÷ sheet size⌉
Frequently asked questions
How many drywall sheets for a 12x12 room?
About 15 sheets of 4×8 drywall for the walls and ceiling of a 12×12 room with 8 ft ceilings, including waste.
What size drywall sheet should I use?
4×8 sheets are easiest to handle solo; 4×12 sheets cover faster with fewer seams but need two people.
How much joint compound do I need?
Budget roughly one gallon of compound per 100 square feet of drywall for taping and finishing.