How much paint is needed for 4 rooms that are 12x12 in?

To calculate the amount of paint needed for four 12x12 rooms, first determine the total wall area. Each room has four walls, so the total wall area for one room is approximately 384 square feet (12 ft height x 12 ft length x 4 walls). For four rooms, that totals 1,536 square feet. Assuming one gallon of paint covers about 350 square feet, you'll need approximately 5 gallons of paint (1,536 ÷ 350 ≈ 4.4). It's advisable to buy an extra gallon to account for touch-ups and variations in coverage.