Roofing Calculator icon

Roofing Calculator

George Stewart
Free
3.8 out of 5
50,000+ downloads

About Roofing Calculator

Roofing calculator is the ultimate tool for carpenters involved in making timber roofing structures.

Simply enter the pitch and run to instantly get information including:

- The rise of the common rafter per metre (or foot) of run.
- The length of the common rafter.
- The length of the hip.
- Bevel angles including the seat and ridge for the rafter and hip/valley.
- The jack rafter decrease based on industry standard centres.

You can also input both IMPERIAL and METRIC units, and calculate using fractions of a pitch degree.


Roofing Calculator includes a big button number pad for ease of use.

This great tool is available for FREE!

Roofing Calculator Screenshots

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