Does this replace span tables, code review, or structural engineering?

No. It is a roof geometry and handoff calculator only. Verify structural sizing, lumber grade, loads, bearing, code, permits, and engineering requirements separately.

What deductions does the calculator show?

It shows ridge-board half-thickness as a run deduction, overhang run, birdsmouth seat note, full common rafter length, and cut-list length for the handoff.

Does this store project measurements?

No server-side storage is used. The calculator runs in the browser and records only coarse local and GA4 product-action events.

roof pitch calculator and rafter cut list

Roof pitch and rafter length calculator

Convert span, pitch, overhang, ridge-board thickness, birdsmouth seat, roof length, spacing, and waste into a jobsite handoff: common rafter length, ridge deduction, overhang run, roof area factor, squares, and rafter count. No satellite measurement, CAD, structural engineering, permit, code, CRM, lead capture, login, payment, or server-side storage.

Calculate cut list

Demand evidence: NeedFactory/DataForSEO run 2026-06-06T011157Z-rafter-length-calculator found roof pitch calculator at 22,200 US searches/month, rafter length calculator at 5,400/month, and birdsmouth cut calculator at 720/month. This route tests whether a tighter crew-supplier handoff beats generic calculator parity.

Ridge, overhang, and birdsmouth deductions

Roof geometry

Project or handoff name Building width (ft) Roof length (ft) Pitch rise per 12 Rafter spacing (in o.c.) Overhang run (in) Ridge board thickness (in) Birdsmouth seat note (in) Waste for squares (%)

Crew note

Visible instrumentation event names

rafter_cutlist_calculated rafter_cutlist_copied rafter_cutlist_downloaded rafter_cutlist_printed

Events are stored locally and sent to GA4 when gtag is available. Payloads use coarse pitch, rafter-length band, rafter-count band, area band, and export type only.

Planning handoff only. This calculator does not verify structural sizing, loads, span tables, lumber species or grade, uplift, bearing, permits, code compliance, or professional engineering requirements.

Crew and supplier handoff