Roofing and Roof Pitch Calculators

Convert horizontal roof dimensions and pitch into sloped area, squares, and product-specific bundle counts.

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Convert horizontal roof footprint and pitch to sloped area, roofing squares, shingle bundles, and material cost.

Convert measured rise and horizontal run into pitch, roof angle, slope factor, and sloped length.

Use horizontal dimensions from a plan or safe measurement. Add the horizontal overhang only if excluded.

Convert the projected area using its slope factor. Mixed pitches need separate sections.

Field shingles, ridge caps, starter strips, underlayment, and flashing are different order lines.

Convert horizontal roof area to sloped area with a pitch-factor table and avoid counting a gable roof twice.

Use installed bundle coverage to calculate shingles instead of assuming every roofing product has three bundles per square.