Pitch is defined as the steepness of the roof and is also termed as gradient or slope. Roof pitch can also be defined as the rise in run. It can be calculated in many ways. This online pitch and angle calculator helps you to calculate the roof pitch and roof angle with either rise and rafter or run and rafter. A rafter is a beam which forms as the internal framework of a roof. Make use of this calculator and determine the roof slope and angle.