You have your color picked out and you know which product of paint is best for your project. Now you need to know how much paint to buy. Benjamin Moore has created a paint calculator to make it really simple.
Start with the dimensions of the room you are painting, and it will take into account if there are doors and windows. This calculator will tell you the amount of paint you will need.
PLEASE NOTE: These calculations are not intended to give more than a rough estimate. Precise paint needs will vary according to many factors, including application method. These calculations assume 2 coats of paint and do not include the ceiling.