The Paint for a House calculator estimates the number of gallons of exterior paint needed to paint a house based on the length, width, height of the framing and roof.
INSTRUCTIONS: Choose units and enter the following:
Gallons of Exterior Paint for a House (GP): The calculator returns the estimate of exterior paint needed in gallons, and the approximate paint surface area in square feet. However, these can be automatically converted to compatible units via the pull-down menu.
The calculator computes the surface area of the house exterior. It then divides the area by 300 square feet per gallon to compute the number of gallons of exterior paint. Most manufacturers call for one gallon of exterior paint to cover 300 square feet (ft2). The formula for the paintable surface area of a common gabled house is:
`A = (2*L* H2 + 2*W*H2 + W * (H1-H2) ) - (WD*15 ft^2 + DR * 21 ft^2 + LWD * 30 ft^2)`
One should use the pricing for paint or primer that can be bought locally since prices may vary. However, the following prices are recent U.S. dollar costs for one gallon of paint or primer in the United States: