# Roof Square Calc > Free, browser-only roof geometry and material planning tools. Estimates only, not construction specifications. - [Roof area](https://roofsquarecalc.com/) - [Pitch factors](https://roofsquarecalc.com/pitch-factor/) - [Pitch calculator](https://roofsquarecalc.com/roof-pitch/) - [Materials](https://roofsquarecalc.com/roofing-materials/) - [Measure from ground](https://roofsquarecalc.com/measure-from-ground/) - [About](https://roofsquarecalc.com/about/) - [Privacy](https://roofsquarecalc.com/privacy/) Formula: projected area × sqrt(1 + (rise / run)^2). One roofing square is 100 sq ft. Uniform pitch per section; no overlapping footprints. Coverage and waste are user assumptions. No accounts, data uploads, ads or active analytics.