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How to Calculate the Cost of Roof Painting

Estimates given by contractors for roof painting vary widely and can often range from a few hundred to thousands of dollars. Because of this, many homeowners choose to bypass the professionals in favor of a do-it-yourself approach. In this case, the only financial cost you'll incur is the price of the paint itself. If you need to calculate the cost of roof painting, you'll need to remember a few of the basic math lessons you learned back in school. Fortunately, the equations required to calculate the cost of roof painting are fairly simple. And, with the help of a calculator, even the worst mathematicians should have little difficulty figuring out the amount of paint they'll need to coat their home's roof.

Step 1

Measure the width of the house on one side. 

Step 2

Measure the length of the house on one side. 

Step 3

Multiply the two numbers together to get the surface area of the roof in feet. 

Step 4

Check the labeling on the paint you intend to buy for exact coverage (a number in feet) per gallon. 

Step 5

Divide the number from Step 3 by the number on the labeling for the exact number of gallons required to paint the roof. 

Step 6

Multiply the number of gallons by the price per gallon and this will give you the overall cost of paint for the roof. 

About the Author

Ryan Lawrence is a freelance writer based in Boulder, Colorado. He has been writing professionally since 1999. He has 10 years of experience as a professional painting contractor. Lawrence writes for High Class Blogs and Yodle. He has a bachelor's degree in journalism and public relations with a minor in history from the University of Oklahoma.