Reviewed September 19, 2026.
Calculator inputs stay in your browser
Our instant estimate, space planner and comparison worksheet run in your browser. We do not send the values you enter to an installation partner, email inbox or application database. There is no lead form or email gate. Values remain in the open page and may be lost when you reload or close it; we do not intentionally save them in cookies or local storage.
Downloading a summary creates a file on your device. Printing uses your browser’s print function. You choose whether to share that file or printed page. Avoid putting sensitive personal information into optional project notes or comparison labels, especially on a shared computer.
Website delivery
The website host processes ordinary request information needed to deliver pages, such as IP address, requested URL and browser information, under its own service policies. We do not run advertising pixels. Fonts and imagery are served from this website or supplied by your device.
External links
Links to cities, governing organizations and manufacturers open their websites. Those websites have their own privacy practices. Following a link may disclose standard request information to the destination. We do not control their content or services.
Changes
This page describes the tools currently published here. This notice describes the current analytics setup. Other collection practices are described separately above. Read About this resource for the role and limits of the planning information.
Website analytics
We use Google Analytics to understand visits, page usage and how people find this resource. Google Analytics uses cookies and receives technical information such as browser and device details and website interactions. We do not send inquiry or planning-tool entries to Analytics. Advertising personalization and Google signals are disabled. Page URLs sent by our tag exclude query strings and fragments.
See how Google uses information from sites that use its services. You can block analytics through browser controls or the Google Analytics opt-out browser add-on.