How much paint to cover 900 sq ft?

From what I've read you need one gallon of paint to cover between 300 to 400 sq. ft. If you are not going dramatically from one color to another (light to light), then you can probably get away with 1 gallon to 400 sq. ft. However if you are going from a dark to light color, then you should do you calculations with the one gallon to 300 sq. ft. ratio or even less. So, if you're going from light to light you're going to need a minimum of 2 1/2 gallons ( I don't believe you can get a 1/4 gallon of paint) of paint to cover 900 sq. ft. If you are going from a dark to a light then you are going to need a minimum of 3 gallons of paint. I would consult this with an associate at the store though or a professional painter. Happy painting! From what I've read you need one gallon of paint to cover between 300 to 400 sq. ft. If you are not going dramatically from one color to another (light to light), then you can probably get away with 1 gallon to 400 sq. ft. However if you are going from a dark to light color, then you should do you calculations with the one gallon to 300 sq. ft. ratio or even less. So, if you're going from light to light you're going to need a minimum of 2 1/2 gallons ( I don't believe you can get a 1/4 gallon of paint) of paint to cover 900 sq. ft. If you are going from a dark to a light then you are going to need a minimum of 3 gallons of paint. I would consult this with an associate at the store though or a professional painter. Happy painting!