Drywall Calculator

Calculate drywall sheets, joint compound, tape, and screws for any room. Know exactly what to buy.

Enter Room Dimensions

Total Wall Length(linear ft)

Wall Height(ft)

Tip: For a 12x15 room, total wall length = 12 + 15 + 12 + 15 = 54 linear feet.

Ceiling Length(ft)

Ceiling Width(ft)

Doors

Windows

Sheet Size

Waste factor

How to Calculate Drywall

Measure the total linear feet of walls in the room, multiply by the wall height to get the wall area. Subtract door openings (~21 sqft each) and window openings (~12 sqft each). Add ceiling area if applicable. Divide total area by sheet size (32 sqft for 4x8, 48 sqft for 4x12) to get the number of sheets.

Budget about 1 bucket of joint compound per 400 sqft, 1 roll of tape per 500 sqft, and 1 lb of screws per 100 sqft.