How much paint is needed to paint the interior of a 1200 square foot house?

To determine how much paint is needed for a 1200 square foot house, you first need to calculate the total wall area. Assuming an average ceiling height of 8 feet, the wall area would be approximately 9600 square feet (1200 sq ft x 8 ft). If one gallon of paint covers about 350-400 square feet, you would need around 24 to 27 gallons of paint, considering additional factors like doors, Windows, and the number of coats required. Always consult with a paint professional for the most accurate estimate based on your specific circumstances.