Measured geometry

Gambrel Roof Calculator

Measure the real break point, then calculate both slopes without an invented upper-to-lower split.

Ridge to break point

Measure the upper horizontal run from the ridge centerline to the break point on one side.

Measurements

Measurement mode

Feet + inchesDecimal feet

Building length

decimal feet

Building width

decimal feet

Gable overhang per end

decimal feet

Eave overhang per side

decimal feet

Upper horizontal run

decimal feet

Required ridge-to-break horizontal measurement on one side.

Upper pitch rise

in per 12 in run

Lower pitch rise

in per 12 in run

Waste

Bundles per square

bundles / square

Enter valid dimensions and a measured break point to see the takeoff.

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