Roofing & Envelope Division

Roofing & Siding Calculators

Engineering-grade tools for roof pitch multipliers, shingle square estimations, and gutter drainage sizing.

Roof Pitch & Angle Converter

Convert rise-over-run pitch ratio into true degrees, area multipliers, and rafter cut angles.

Calculate bundles of architectural shingles, roofing squares (100 sq ft), ridge caps, and underlayment.

Determine whether you need 5" or 6" K-style gutters, number of downspouts, and fascia hangers.