Rafter Length Calculator
Span (horizontal distance)
Please enter a positive number.
Overhang (horizontal)
Please enter a non-negative number.
Pitch (rise per 12 inches)
Please enter a non-negative number.
Units
Feet
Meters
Calculate Rafter Length
Formula:
Rafter Length = (Span/2 + Overhang) / cos(arctan(Pitch/12))