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How Much Paint Will You Need?

Before choosing the paint color for your next home improvement project, it is essential to first determine how much paint you will need to cover your space. To do this, simply measure the room you want to paint, enter the measurements below to the nearest foot, and click 'calculate' to determine how much paint you will need.

How to calculate how much paint you need

To calculate how much paint you need first enter the width of each wall to be painted into the calculator and the height of the walls. Include the ceiling if that is to be painted. Find the square footage of triangular or sloping walls – such as those where ceilings are vaulted – by multiplying the length of the base of the triangle by the height at the highest point and dividing by two.

To make sure you have enough paint do not subtract any square footage for windows and doors unless they significantly reduce the square footage of that wall.

How many square feet does a gallon of paint cover? 

Most typically, a gallon of paint covers anywhere from 350 to 400 square feet. Meaning that a gallon of paint is enough to cover a small space, like a bathroom. Depending on the number of coats you intend to paint, one to two gallons of paint is the average amount for a typical-sized room. To be most precise it is best to consult the manufacturer's advice on the label. 

How much paint do you need for a bedroom?

The size of bedrooms varies but averages around 800 square feet, which requires one to two gallons of paint — factoring more than one coat of paint being used. This being said, it is best to use the above calculator to find the exact amount of paint needed for your space. 

 
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