Privacy
Calculator inputs stay in your browser unless you choose to share a link.
Local calculations
Our calculation code does not submit form inputs to a server. This release does not install analytics trackers, advertising pixels, login cookies or browser storage for calculator inputs and checklist state. Reloading an ordinary page resets its state.
Shared links contain inputs
The Share calculation action places your inputs in the URL and copies it to your clipboard when permission is available. The browser may ask for clipboard permission; if copying fails, a selectable link is shown. Anyone who receives that link can read the included values.
A shared URL can appear in browser history and hosting request logs. Do not put confidential job details into a calculation you share. The Reset action removes query parameters from the current page’s URL.
Hosting and browser requests
The site is designed for Cloudflare hosting. The host processes normal web requests, which may include an IP address, browser information and requested URL. Logging and retention depend on the site owner’s hosting configuration and Cloudflare’s applicable policies. This page does not claim that hosting logs are disabled.
External reference links
Source links take you to other websites with their own privacy practices. External links use noreferrer to avoid sending this page’s URL as a referrer. There are no embedded third-party videos or remotely loaded fonts in this release.
Print and sharing choices
Printing sends the page to your browser’s print workflow or selected printer. Publishing or sending a calculation link is your choice; this site does not send messages or email on your behalf.
Updated October 3, 2026.