Gable Roof Calculator

Estimate rafters, ridge, fascia, sheathing, roof sheets, and rough cost for a simple gable roof.

Roof Setup

Enter the basic size and framing layout for your gable roof.

Span (ft)

Structure Length (ft)

Overhang (in)

Roof Pitch

Rafter Spacing (in O.C.)

Ridge Type

Framing Lumber

Choose lumber sizes for rafters, ridge, and fascia.

Rafter Lumber

Ridge Lumber

Fascia Lumber

Roof Coverings

Choose sheathing and roof finish for estimating materials.

Sheathing

Roof Covering

Waste %

Material Pricing

Optional — only used for rough estimate totals.

Edit Material Prices

Expand only if you want to adjust your local lumber and sheet prices.

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Estimated Roof Materials & Framing Guide

This calculator is intended for rough estimating and planning. Always verify dimensions, framing layout, structural requirements, and local code before building.

Run the calculator to see your estimate.

Construction Material Calculator

Gable Roof Calculator

Roof Setup

Framing Lumber

Roof Coverings

Material Pricing

Estimated Roof Materials & Framing Guide

Gable Roof Calculator Estimate

Roof Info

Framing Results

Estimated Materials

Costs