Roofing Rafter 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.