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Roof Truss Pitch & Angle Calculator

Convert between pitch ratio and degrees and see rise and run.

Pitch & Angle Calculator

Try an example:

Roof Span

Wall-to-wall width of the building

Building Length

Length along the ridge

Pitch Input Choose rise-per-12 or an exact angle

Roof Pitch Rise per 12" of run

Overhang

Eave overhang beyond the wall

Roof TypeChanges slope geometry and area

Min. Usable Ceiling Height (ft)Used for the usable attic/room width result

Material

Truss Spacing (in o.c.)

Your Price per Truss ($)Optional — leave 0 to estimate from lumber

Snow Load (psf)

Wind Load (psf)

Roof Height—

Rafter Length (with overhang)—

Rafter (no overhang)—

Roof Angle—

Rise—

Run—

Roof Area—

Truss Count—

Estimated Lumber—

Material Cost—

Cost per Truss—

Dead Load—

Live Load—

Snow Load—

Wind Load—

Total Weight—

Usable Room Width—

Estimate: $0

Material $0 · Labor $0 · Install $0

Include installation cost in total

Estimates only. Prices vary by region, supplier and site conditions.

angle = arctan(pitch ÷ 12)

Switch Pitch Input to Angle to enter degrees directly. For rafter details go to the rafter length calculator.