Built for a fast architecture workflow
- Horizontal run input
- Roof rise input
- Pitch angle in degrees
- Rafter/sloping length
- Approximate two-slope gable roof area
Roof Pitch Calculator
Use simple roof geometry to convert run and rise into pitch angle, rafter length and an approximate two-sided gable roof surface area.
How to use it in practice
With a 4 m horizontal run and 1.2 m rise, the sloping rafter length is about 4.176 m and the pitch angle is about 16.7°. A 10 m long simple gable roof would be about 83.5 m² before allowances.
How to use Roof Pitch Calculator
- 1
Enter the horizontal run from ridge to eave.
- 2
Enter the vertical rise over that run.
- 3
Add the building length for the area calculation.
- 4
Calculate to view roof angle, rafter length and approximate total area for both roof slopes.
Common questions
Does the roof area include overhangs?
Only if the run and building length you enter include them. The calculator uses the dimensions provided.
Does it work for hip roofs?
The current area result assumes two equal sloping sides of a simple gable roof, so more complex roof geometry needs separate calculation.
Is waste included?
No. Add project-appropriate waste or cutting allowances separately.
Related architecture tools
ARCHITEAM WORKSPACE
Open Roof Pitch Calculator →Use the calculator or tool directly in your browser.
Your existing ArchiTeamTools workspace opens with this tool selected.