DIY Frequently Asked Questions / How much of an area will a gallon of paint cover?
For many paints, a gallon will cover 400 square feet. However, the quality of the paint can affect how much it will cover. The label on the paint can usually provides some guidance. In addition, there are a number of factors that affect how much paint you will need. These include the type of surface being covered, the color currently on the surface and the color being applied.