Roofing Calculators
Every tool here runs on the same material and labor dataset, so a shingle count on one page matches the estimate on another. Nothing asks for your email.
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Roof Replacement Cost Calculator
Full estimate by size, pitch, material and state. This is the main tool.
Cost calculators
Price a job with material and labor split out.
Metal Roof Cost Calculator
Enter your roof size and pitch for a 2026 metal roofing estimate with the material and labor split shown separately.
Flat Roof Cost Calculator
Enter your roof area for a 2026 membrane roofing estimate covering material, labor and permit.
Gutter Cost Calculator
Enter the linear feet of gutter your home needs for a 2026 installation estimate with material and labor separated.
Roof Repair Cost Calculator
Enter the size of the damaged area for a 2026 repair estimate.
Measurement tools
Turn dimensions into roof area, squares and pitch.
Roof Pitch Calculator
Enter the rise over a 12-inch run to get your roof pitch as a ratio, an angle, a percent grade, and the multiplier you need to turn a floor footprint into real roof area.
Roof Square Footage Calculator
Enter the length and width of the house and the roof pitch.
Roof Square Calculator
Roofers buy, bid and talk in squares, not square feet.
Hip Roof Calculator
Enter your building footprint and pitch to get total hip roof surface area, hip rafter lengths and the material a hip roof needs, including its higher waste factor.
Gambrel Roof Calculator
A gambrel roof has two pitches per side: a shallow upper slope and a steep lower one.
Material take-off
Work out exactly what to order.
Roof Shingle Calculator
Enter your roof area to get a complete shingle order: bundles, underlayment, starter strip, ridge cap, drip edge and fasteners, with waste included.
Roof Material Calculator
Pick a roofing system and enter your area.
Roof Sheathing Calculator
Enter roof area to get the number of 4×8 sheets required, plus fasteners and cost.
Framing and structure
Rafters, trusses, ventilation and load.
Rafter Length Calculator
Enter the building span and roof pitch to get common rafter length, ridge height above the plate, and the board length you need including overhang.
Roof Truss Calculator
Enter your building dimensions and spacing to get truss count, total span load, and an installed cost range for the truss package.
Roof Ventilation Calculator
Enter attic floor area to get the net free ventilating area your roof needs, balanced between soffit intake and ridge exhaust, plus how many vents that means.
Roof Snow Load Calculator
Enter your ground snow load and roof pitch to get the design sloped-roof snow load, following the ASCE 7 formula that building departments use.