How Much Paint for a 1800 Sq Ft House: Estimating the Paint Needed for Your HomeSarah ThompsonApr 08, 2025Table of ContentsCalculating the Total Wall AreaHow Many Gallons of Paint Do You Need?FAQTable of ContentsCalculating the Total Wall AreaHow Many Gallons of Paint Do You Need?FAQFree Smart Home PlannerAI-Powered smart home design software 2025Home Design for FreeWhen it comes to painting your 1800 sq ft house, determining how much paint you need can be a bit tricky. Generally, a gallon of paint covers approximately 350 to 400 square feet for one coat. Therefore, if you plan to apply two coats, you’ll need to double that amount. The total wall area of your home, including ceilings, doors, and windows, will dictate the quantity required.Calculating the Total Wall AreaTo accurately estimate the paint needed, you'll first need to calculate the total wall area. For an average 1800 sq ft house with 8-foot ceilings, the wall area can be roughly estimated. Start by multiplying the perimeter of your house by the height of the walls. Don’t forget to subtract window and door areas!How Many Gallons of Paint Do You Need?Once you have the total wall area, divide that number by the coverage of a gallon of paint. For instance, if your wall area is approximately 2400 sq ft and you're applying two coats, you would need about 12-14 gallons of paint. Remember to consider the type of paint, as some may require more or less coverage.FAQwelcome to CoohomHome Design for FreePlease check with customer service before testing new feature.