Roofing Area & Material
Calculate identical rectangular roof-plane areas using measured sloped lengths, then apply product coverage and your allowance.
Use roofing area & material →CALCULATORS BY INDUSTRY
Roofing calculators
Estimate measured roof areas, use actual product coverage and plan whole-package purchases.
1 free tools. No signup. Methods, examples and source links on every page.
Before you use these calculations
Use actual sloped plane dimensions or the exact geometry stated by the tool.
Choose coverage for the actual layer, product and installation configuration.
Ordering allowances do not establish flashing, fastening or structural design requirements.
Start with the example, replace the assumptions with your measurements, then change one input to see its effect. Save or export the scenario if you need to keep its basis.
How Case calculators are built and checked →Read practical calculation guides or browse another industry.