7+ Hip Rafter Calculator. Enter the roof base dimensions and the roof pitch, and choose the type of hip roof. Calculate the length of a common rafter based on roof pitch and horizontal run.

Useful for layout, cutting, and roof design. Interactive roof and rafter calculator for gable, shed, saltbox, hip, valley, blind valley, gambrel, polygon, and bay window roofs. The script also returns passed or failed for the d/4 and 1/3 rule.





