About
Roofing Calculator is a free, browser-based set of tools for roof measurement and early project planning. It helps users estimate roof pitch, roof area, shingle quantity, metal roofing quantity, rafter length, and rough replacement cost ranges. The calculators are useful for homeowners, roofers, estimators, and remodelers who need a fast way to sanity-check project scope or compare contractor bids. Inputs are designed around common roof-planning questions and produce estimates that are meant for planning, not for replacing an onsite inspection. Because everything runs in the browser, it is quick to use on desktop or mobile when reviewing a property or preparing a quote. It is especially helpful when you need to understand roof geometry and material needs before committing to a larger roofing project.