Overview
What Is a Roof Pitch Calculator?
This tool calculates roof pitch (expressed as rise over 12 inches of run) and the equivalent angle in degrees.
Calculate roof pitch and angle instantly.
This tool calculates roof pitch (expressed as rise over 12 inches of run) and the equivalent angle in degrees.
Useful for understanding roof slope specifications and planning roofing projects.
Input the vertical rise measurement.
Input the horizontal run measurement.
Results update automatically.
It means the roof rises 6 inches vertically for every 12 inches of horizontal run.
Pitch is expressed as a ratio (rise:12); angle is expressed in degrees - both describe the same slope differently.
Common pitches range from 4:12 to 9:12, though this varies by architectural style and climate considerations.
It affects water/snow shedding, material requirements, attic space, and architectural appearance.
Pitch = (Rise ÷ Run) × 12, expressed as rise:12.
Angle = arctan(Rise ÷ Run), converted to degrees.
Not necessarily - steeper roofs cost more to build and roof but drain water/snow more effectively; the right choice depends on climate and design goals.
No, calculations happen entirely in your browser.
Yes, roof pitch affects solar panel efficiency and installation considerations.
Yes, completely free with no sign-up required.