Rafter Calculator for St. Louis, MO

Find rafter length from building width, pitch and overhang. Get your numbers below, then request quotes from contractors serving St. Louis, MO.

Building width

Roof pitch

Overhang

Rafter length

13.42 ft

With overhang: 14.53 ft
Run: 12 ft
Rise: 6 ft
Pitch angle: 26.6°

Geometry only — this does not determine structural load capacity or code compliance. Confirm framing with a licensed professional.

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