Estimate roof area, roofing squares and shingle bundles from footprint, pitch and waste.
How to use this calculator
Enter real project measurements and select the correct units. The quantity engine is deterministic; market prices are stored and verified separately.
Cost data is market-specific
Material and labor prices vary by location, specification and site conditions. Calcavera separates quantity math from pricing so each layer can be updated and audited independently.
Frequently asked questions
Are the results estimates?
Quantities follow defined formulas and your inputs, but real projects can require site-specific adjustments and allowances.
Where do cost ranges come from?
AI does not invent prices. Cost ranges appear only when an active market rate with source and verification date has been configured.