Roofing Calculator

George Stewart

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About this app

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.

Ratings and reviews

The Jack rafters answers on 18 inch on center is inaccurate. Its showing the same answer as 24 inch on center. The user should be able to input the roof pitch by ?/12 or by degrees, this app only allows input of roof pitch by degrees so if the user only knows the pitch by rise per foot of run then this creates a problem and the user then has to figure that out on his own.

Great app. Nice and easy quick look up for cuts. All the negative feedback on here are from people that have no understanding of roofing.

Good app however I can't see the rest of the calculations at Ridge area. It doesn't slide to left to make it visible.