Roof Pitch Calculator
The Roof Pitch Calculator simplifies the complex geometry of roof construction. Accurately determining the pitch (slope), angle, rise, and run is crucial for proper drainage, material estimation, and structural integrity. Use this tool to get precise measurements for any roofing project.
Find the rafter length, total run, and roof angle instantly by simply entering the rise and pitch, or the rise and run.
Roof Pitch & Rafter Calculator
Enter any two measurements to calculate the rest of the roof dimensions.
Calculation Results
Roof Pitch: --
Roof Angle: --
Total Run: --
Total Rise: --
Rafter Length: --
Key Roof Pitch Terminology
Pitch
The steepness, expressed as **Rise per 12 inches of Run**, e.g., 6/12.
Rise
The total vertical height from the wall plate to the ridge.
Run
The total horizontal distance from the wall to the ridge (half the building's span).
Rafter Length
The length of the beam running from the wall plate to the ridge, calculated via the Pythagorean theorem.