Roof Pitch Calculator

All tools

Angle, slope and rafter length conversions

Pitch converter

Edit any field — the others update instantly.

°
%
: 12
cm/m
Common pitches

Rafter length

Uses the current pitch to size the rafters of a symmetric gable roof.

m
Outside wall to outside wall, in meters.
cm
Horizontal overhang beyond the wall, in centimeters.
Angle
—
Slope
—
Ridge height
—
Rafter length
—

Rafter length is given per side, measured along the slope including the overhang.

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