Project category / 08
Roof quantities.
Measured from safe ground.
Translate plan dimensions and verified pitch into sloped area, squares, product packages, underlayment, and a same-scope replacement budget.
All-purpose estimator
Roof Shingle Calculator
Use measured sloped area and the exact product’s installed bundle coverage to calculate squares and whole bundles.
Calculate shingles →Calculators
Run the numbers.
Each tool keeps measurements, allowances, package rounding, and costs visible.
Shingle Calculator
Estimate shingle bundles and roofing squares from sloped roof area, product coverage and allowance.
Open calculator →02Roof Area Calculator
Convert a simple roof plan area into estimated sloped area with an editable rise-and-run pitch.
Open calculator →03Roofing Square Calculator
Convert measured roof area and allowance into roofing squares and purchase area.
Open calculator →04Roof Cost Calculator
Build an editable roof-replacement budget from area, materials, labor, tear-off and fixed costs.
Open calculator →05Roof Pitch Calculator
Convert rise and run into pitch per 12, angle in degrees and roof-area multiplier.
Open calculator →06Shingle Bundle Calculator
Convert roofing squares into bundles using a product-specific bundles-per-square value and allowance.
Open calculator →07Underlayment Calculator
Estimate whole underlayment rolls using roof area, overlap allowance and product-specific net coverage.
Open calculator →Field notes
Measure smarter.
Plan the details.
Roof Pitch Guide
Pitch written as rise:12 states vertical rise for every 12 units of horizontal run; higher pitch increases surface area and changes access, drainage, detailing, and product limitations.
Read guide →Guide 02How Many Shingles?
Measure actual sloped plane area, add a layout-based allowance, divide by field-shingle bundle coverage, and separately calculate starter, caps, underlayment, membranes, flashing and ventilation.
Read guide →Guide 03Roof Replacement Cost
Compare the same measured roof, removal layers, deck-repair rules, complete roof system, flashing, ventilation, access, protection, disposal, permits, warranty and payment terms.
Read guide →