Roofing Calculator

Calculate metric and imperial dimensions for timber roofs of any span and pitch.

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.