7 Best Of How To Determine The Pitch Of My Roof HD Image Size. First measure 12 inches from one end of the level and make a mark. Divide the first part of the ratio by 12 to work out the pitch.
Roof pitch refers to the slope which the rafter creates. If you know the roofs angle in degrees you can find the roof pitch by converting the angle in degrees to a slope then finding the rise by multiplying the slope by 12. Check your results with the Omni Roof Pitch Calculator.
Leah answers a viewers question about how to calculate the pitch of a roof on a structureLeahs Recommended Tools for Beginner DIY-ersPower ToolsDeWalt 2.
To calculate roof pitch one must employ a simple equation from high school algebra used to calculate the slope. On a ladder beside the roof place the level a foot or so up the roof hold it level and measure from the 12-inch mark on the levels bottom straight down to the roof. In the United States a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches. For example if the roof rises 4 feet and the span is 16 feet twice the run then the pitch is 416 or 14.