Construction & Architecture / Materials & Design

Paint Coverage Calculator

Room Length (ft)

Room Width (ft)

Ceiling Height (ft)

Number of Doors

Door Width (ft)

Door Height (ft)

Number of Windows

Window Width (ft)

Window Height (ft)

Coverage per Gallon (sq ft)

Typical: 350-400 sq ft

Number of Coats

Price per Gallon ($)

Optional

Wall Area = (Length × Height × 2) + (Width × Height × 2) - Door Area - Window Area

Total Area = Wall Area × Number of Coats

Gallons Needed = ROUNDUP(Total Area / Coverage per Gallon)

Coverage tips: Rough or porous surfaces may require more paint. Primer coats typically cover 200-300 sq ft per gallon.

See Also