Calculate roof pitch by climbing a ladder up to the point where the roof begins. Hold the level horizontally so that the end of the level touches the roof about 12 inches above the bottom of the roof.What is the formula to figure the square footage?
The formula to calculate the square footage of an area that is square or rectangular in shape is length multiplied by width equals the area's square footage. For example, if a rectangular shaped room measures 11 feet in length and 13 feet in width, 11 multiplied by 13 equals 143 square feet.How do you figure square footage for painting?
Measure the length of one wall to be painted in feet. Then measure the height of the wall in feet. Multiply the length of the wall by the height to get the square footage. If you're painting more than one wall, find the square footage of each wall and add them together for the total square footage.