How to Calculate How Much Paint You Need. On average, one gallon of paint will cover 350 square feet. A standard door is about 20 square feet, while a window is usually about 15 square feet.

Oftentimes if you are painting a similar color on a pre-painted surface and using a 2-in-1 paint with primer, a good cleaning and light sanding will do. If you’re trying to paint over a darker ...

One is an adjustable brush holder, such as the Wooster lock jaw ($8.90 at Home Depot), which holds a brush at an angle that allows you to paint a straight line. For best results, use this type of ...

Doing this will help keep your paint job looking good for significantly longer. Wait 2-4 hours between coats. megaflopp/Shutterstock. Patience is a virtue when it comes to painting.