How many square feet in 18 x 24 inches?

Well, isn't that a happy little question! To find the square footage of a rectangle, you multiply the length by the width. In this case, 18 inches by 24 inches equals 432 square inches. To convert that to square feet, you divide by 144 (since there are 144 square inches in a square foot), giving you 3 square feet. Happy painting!