Rafter Length Calculator | Free Construction Calculators
Calculate the length of rafters needed based on roof span, pitch, and overhang.
About Rafter Length
Rafters are the diagonal structural members that form the slope of a roof. Accurate rafter length calculations ensure proper fit and structural integrity. The calculation accounts for the roof pitch, building span, and any overhang beyond the walls.
Important Note
These calculations provide the theoretical rafter length. Always add material for cuts, bird mouth notches, and tail cuts. Consult local building codes for rafter sizing requirements.