Rafter Dimensions Calculator
Span (horizontal distance in ft)
Please enter a positive number.
Pitch (rise per 12 in)
Please enter a positive number.
Overhang (horizontal in ft)
Please enter a non-negative number.
Spacing (center-to-center in ft)
Please enter a positive number.
Calculate
Results
Rafter Length (total):
Pitch Angle:
Number of Rafters:
Formula Breakdown