Roofing Calculator

Shingle bundles from roof size and pitch.

Input Parameters

Length (ft)

Width (ft)

Pitch (x/12)

Shingle bundles45

Roof area (ft²)1341.640786

Factor×1.12

175 available

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Shingle bundles from roof length, width and pitch with slope factor and 10% waste.

Slope factor?

√(pitch² + 144) ÷ 12 converts plan area to true roof area.

Bundle coverage?

Standard 33.3 ft² per bundle (3 bundles = 100 ft² square).

Steep roofs?

Higher pitch wastes more on cuts — the factor grows automatically.