EdgeSpace Rafter Calculator

Common rafter length, plumb & seat cuts, birdsmouth, cut list + PDF. Offline. One purchase.

EdgeSpace – Rafter Calculator is a fast, offline common-rafter layout tool for carpenters, framers, roofers, and deck builders.

Enter roof span and pitch (X/12), or rise and run. Optionally add overhang, ridge thickness, birdsmouth depth, and material thickness. Get live common and total rafter length, plumb/seat cut angles, heel height, ridge deduction, slope %, and a contractor cut list.

FEATURES • Span + pitch or rise + run modes • Live calculation as you type • Inches with fractions, plus feet, mm, and cm • Blueprint-style roof diagram • Contractor cut list • Share, copy, and export a printable PDF job ticket • History and favorites • Fully offline — no account, no ads, no subscription

Built for professionals who need accurate rafter layout in seconds. One purchase. Yours forever.

Note: Always confirm local building codes and project requirements before cutting.

WHO IT’S FOR Framers and roofers laying out common rafters. Span + pitch or rise + run, then overhang, ridge, and birdsmouth. Plumb/seat cuts, heel height, ridge deduction, and a contractor cut list with PDF ticket.

Common-rafter layout — not just pitch conversion.