Roofing & Exterior
Metal Roofing Calculator
Estimate metal roof panels, trim, fasteners, waste and optional material cost.
Open CalculatorRoofing math drives everything from material orders to safety planning. Use these tools to nail down pitch, angle and coverage before you get on the ladder.
Estimation tools
Roofing & Exterior Calculators
Choose a roofing & exterior calculator to estimate materials, measurements and preliminary project quantities.
Roofing & Exterior
Roofing Underlayment Calculator
Estimate roofing underlayment rolls, waste and optional material cost from effective coverage.
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Roof Sheathing Calculator
Estimate plywood or OSB roof sheathing panels, waste, clips, fasteners and optional material cost.
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Roof Ventilation Calculator
Estimate attic intake and exhaust NFVA, vent quantities and optional material cost.
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Roofing Cost Calculator
Estimate roof-replacement materials, labor, tear-off, accessories, tax and contingency.
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Roof Pitch Calculator
Determine roof pitch, angle and rafter length.
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Roofing Calculator
Estimate roofing squares, shingle bundles and material cost based on roof size, pitch and waste.
Open CalculatorProject guides
Roofing & Exterior Project Guides
Learn the measurements, formulas, assumptions and common mistakes behind each estimate before ordering materials.
Roofing & Exterior
Roof Pitch Chart
Compare roof-pitch angles, slope percentages, and rafter multipliers, then calculate any verified rise and run.
11 min readRead Guide
Roofing & Exterior
How Much Does a New Roof Cost?
Build a transparent preliminary roof-replacement budget using current local material prices, written labor quotes and project-specific allowances.
10 min readRead Guide
Roofing & Exterior
How Much Roof Sheathing Do I Need?
Learn how to estimate plywood or OSB roof sheathing panels, waste, clips, fasteners and optional material cost.
9 min readRead Guide
Roofing & Exterior
How Much Roof Ventilation Do I Need?
Learn how to estimate attic ventilation, balance intake and exhaust NFVA, and calculate individual or linear vent quantities.
8 min readRead Guide
Roofing & Exterior
How Much Metal Roofing Do I Need?
Learn how to estimate metal roofing panels, coverage widths, panel lengths, trim, fasteners, waste and optional material cost.
8 min readRead Guide
Roofing & Exterior
How Much Roofing Underlayment Do I Need?
Learn how to estimate felt, synthetic and self-adhered roofing underlayment rolls using effective coverage, overlaps and waste.
8 min readRead Guide
Roofing & Exterior
Roofing Material Calculator
Estimate shingles, underlayment, drip edge, and roofing materials for your next roof replacement. Learn how to measure a roof, calculate waste, and use our free Roofing Material Calculator.
7 min readRead Guide