Free Roof Pitch Calculator for USA

The Roof Pitch Calculator USA by ToolsOnClick helps contractors, architects, and homeowners accurately measure the slope and angle of a roof using rise and run values. It’s a quick, precise, and easy-to-use tool for roofing design and planning.

Whether you’re building a new roof or replacing an old one, knowing the correct roof pitch is crucial for determining material requirements, drainage capability, and structural stability.

Formula Used:

Pitch = Rise ÷ Run

Angle (°) = arctan(Rise ÷ Run)

Slope (%) = (Rise ÷ Run) × 100

Example: A roof with a 6-inch rise and a 12-inch run has a 6/12 pitch, which equals a 26.57° angle.