Roof Pitch Calculator

Enter the vertical rise and horizontal run to find your roof's pitch, angle, and grade.

Note: Standard US pitch is measured over a 12" run.
Pitch 6/12
Angle 26.6°
Grade 50%

Understanding Roof Pitch

Roof pitch is the measurement of a roof's vertical rise over its horizontal run. It tells you how many inches the roof goes up for every 12 inches it goes across.

  • Low Slope: Flat roofs or pitches up to 3/12.
  • Conventional Slope: Pitches between 4/12 and 9/12.
  • Steep Slope: Anything above 9/12 (requires special safety equipment for walking).