Roofing Rafter Calculator

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.