29+ Rafter Cut Calculator. The rafter length calculator is engineered for fast and precise computations of key roof rafter parameters. Use our free rafter calculator to easily design and customize rafter blueprints.

When framing a roof, it’s crucial to accurately calculate rafter lengths, make precise cuts, and ensure proper alignment. The rafter length calculator is engineered for fast and precise computations of key roof rafter parameters. This calculator will give you the total number of rafters needed for the job (including ridge boards), length of each rafter, length of lumber (boards) for each rafter, as well as total.








