Rafter Length Calculator
Calculate precise rafter lengths for your roof project with our free calculator. Input your measurements below to get accurate results.
Understanding Rafter Length Calculations
What is a Rafter?
A rafter is a structural beam that extends from the ridge or hip of a roof to its eave. It's one of the main components that provides support for the roof deck and covering materials.
How to Use This Calculator
- Enter the building width in feet
- Input the overhang length in inches
- Specify the beam width in inches
- Select the roof pitch (ratio over 12)