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what is the formula for roof slope. Use online slope angle calculator to find the run slope and angle of the roof. Roof Pitch Interactive Tools.
Pitch S N 12 Slope S N 100 Angle tan-1 S N Where S Rise inches N Run inches Related Calculator. A A roof with a 6 rise for every 12 run has a 6 per foot or 6 in 12 pitch. The rise is the height of the roof and the run is the horizontal span as pictured above.
You can also calculate roof pitch even without using a roof slope calculator.
X-rise12-run This means that for ever 12 inches horizontally the roof rises x-number of inches. Here are the equations you may use to solve for the length of the slope and the rafter. Use online slope angle calculator to find the run slope and angle of the roof. Next multiply the area by your roofs pitch.