How Much Paint Should You Buy
Conventional wisdom says that it takes approximately one gallon of paint to cover a room up to 400 square feet, but this is a single-coat estimate for a small room like a bathroom. But other vairables impact how much paint you should buy, such as the size and number of doors to the room, the height of the ceiling, the size and number of windows and whether you have crown molding, wainscotting and other deorative elements.