About Roofing Calculator
Free roofing calculators for pitch, area, materials, rafter length, and replacement cost — built for contractors and homeowners.
What It Does
Roofing Calculator is a free suite of roofing tools — roof pitch, roof area, shingle and metal roofing materials, rafter length, and replacement cost estimates for 11 material types. Each calculator includes interactive SVG diagrams that update in real time as you enter measurements, so you can visualize your roof geometry as you calculate.
Why We Built It
Contractors need quick on-site calculations without pulling out a textbook. Homeowners need to understand their roof before talking to contractors — knowing your pitch, area, and approximate cost puts you in a stronger position. We built tools for both audiences that are fast, visual, and require no login.
Who This Site Is For
Roofing Calculator is designed for homeowners researching a project before requesting bids, as well as contractors, estimators, and sales teams who need fast planning numbers in the field. The calculators are built for early estimates and material planning, not as a substitute for an on-site inspection.
Data Sources
Material pricing represents planning ranges compiled from commonly reported contractor pricing. Roof pitch calculations use standard trigonometric formulas (rise/run). Building code references follow the International Residential Code (IRC). All calculations run entirely in your browser - no data is sent to any server.
How Often Pricing Is Updated
We periodically review pricing assumptions against commonly reported contractor pricing. The numbers on this site are planning estimates meant to help with budgeting and comparison, not to replace a written quote from a licensed contractor. Labor rates, permit fees, disposal costs, and roof complexity vary significantly by market.
Editorial and Calculation Standards
We aim to explain each estimate clearly: what inputs are used, which assumptions are included, and what the output does not cover. When a page references code requirements or typical installation ranges, the goal is to provide a practical planning baseline that can be checked against product documentation and local contractor guidance.
Contact
Have feedback or questions? Reach us at [email protected].