Toolnoza

CONSTRUCTION TOOL

Roof Pitch Calculator

Convert roof rise and horizontal run to angle, percent slope and pitch per 12.

Roof Pitch Calculator

FREE ONLINE TOOL

Visualize your roof pitch

Use the same unit for rise and run. Run is the horizontal distance from the eave to the ridge, not the full building width.

Try a roof pitch
A side view of a roof with a right triangle showing rise, horizontal run and angle. Rise: 6; Horizontal run: 12.26.57°6:12Rise: 6Horizontal run: 12
Pitch
6:12
Angle
26.57°
Slope
50 %
Roof area multiplier
1.12×

STEP BY STEP

How to use roof pitch calculator

  1. Calculate or generate the result.
  2. Review the method and example.

IN PRACTICE

Example

Rise 6 and run 12 give 6:12 pitch, 50% slope and 26.565°.

GOOD TO KNOW

What method and assumptions are used?

Angle = atan(rise / run); pitch = 12 × rise / run. Run is horizontal distance, not rafter length.

Practical guides

Slope Percentage Calculator: Formula, Rise, Run and Degrees →

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