roof-pitch-calculator

Enter Your Roof Measurements

Rise (Vertical Height)

Vertical distance from top plate to peak

Run (Horizontal Distance)

Half the building span — wall to ridge center

I know the full Span instead (auto-halve)

Roof Pitch

: 12

Rise per 12 inches of run

Run (Horizontal Distance)

Roof Pitch

: 12

Rise per 12 inches of run

Rise (Vertical Height)

Roof Angle

Measured with inclinometer, speed square, or level

Run (Horizontal Distance)

Calculate Roof Surface Area ▾

Building Length

Along the ridge (horizontal)

Building Width (Span)

Full span perpendicular to ridge

Add Solar Context ▾

Project State For latitude-based optimal tilt

Site Latitude

°N

Select a state to see optimal tilt

Roof Profile Diagram

Common Roof Pitch Reference Chart

Pitch	Degrees	Grade %	Multiplier	Category

Roof Pitch

6 : 12

6 inches rise per foot of run

Angle

26.6°

Grade

50.0%

Radians

0.464

Rafter Length

13.4 in

Slope Mult.

× 1.118

Roof Area

—

RAFTER LENGTH DETAIL

Rafter length: 13.42 inches per foot of run
For a 12 in run: 13.42 in total rafter

Standard / Conventional

Most common residential range. Compatible with all roofing materials.

Roofing Material Compatibility

Enter Your Roof Measurements

Common Roof Pitch Reference Chart

Solar Production Efficiency vs. Tilt Angle

Need roof pitch in your solar proposals?