Roofing calculators
Roof area, pitch, shingles, metal panels, underlayment, sheathing, and rafters.
Roofing Calculator
Roofing Calculator estimates roof area, squares, bundles, rolls, and sheathing for simple pitched residential roofs.
Open calculator ↗RoofingRoof Area Calculator
Roof Area Calculator estimates sloped roof surface area for converting building footprint and pitch into roof square footage.
Open calculator ↗RoofingRoof Shingle Calculator
Roof Shingle Calculator estimates asphalt shingle squares and bundles for sloped residential roof takeoffs.
Open calculator ↗RoofingAsphalt Shingle Calculator
Asphalt Shingle Calculator estimates asphalt shingle bundles for architectural and three-tab shingle roofs.
Open calculator ↗RoofingMetal Roof Calculator
Metal Roof Calculator estimates metal panels by roof-plane layout for standing-seam and exposed-fastener roof planning.
Open calculator ↗RoofingRoof Pitch Calculator
Roof Pitch Calculator estimates pitch ratio, angle, slope, and common rafter line for checking measured roof rise and run.
Open calculator ↗RoofingRoof Underlayment Calculator
Roof Underlayment Calculator estimates underlayment rolls from roof area for felt or synthetic underlayment planning.
Open calculator ↗RoofingRoof Sheathing Calculator
Roof Sheathing Calculator estimates 4×8 roof sheathing sheets for simple pitched roof deck replacement or new construction.
Open calculator ↗RoofingRafter Calculator
Rafter Calculator estimates common rafter geometric line length for preliminary gable-roof layout from rise, run, and span.
Open calculator ↗Roofing guides
Use these Roofing guides to understand measurements, assumptions, material specifications, and ordering decisions before applying the related calculators.
Roof Pitch, Slope Multiplier, and Roof Area
Learn how roof rise, run, pitch multiplier, footprint, overhangs, and separate roof planes affect roof area estimates and roofing material takeoffs.
Read guide →Estimating basicsHow to Use Construction Calculators for Material Estimates
Learn how to use construction calculators, choose project inputs, verify supplier data, handle waste and rounding, and check estimates before ordering.
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