Business math, made visible
Privacy policy
Calculator entries
Calculator inputs are processed in your browser. This site does not send those entries to a server, save them in local storage, or include them in page URLs. There are no user accounts or submission forms for calculator results. Refreshing the page returns the calculator to its sourced teaching example.
Site tracking and hosting
This static site includes no own analytics scripts, tracking pixels, or tracking cookies. Hosting infrastructure may process ordinary request information to deliver pages and maintain service. Visiting a link to an official source sends a request to that source, which applies its own privacy practices.
Third-party advertising
No advertising scripts are included in this build. Empty spaces are reserved for later ads. Third-party advertising from Adsterra may set cookies or use similar technologies if ads are added. Third-party providers may process device and request information under their own policies. Browser settings can restrict cookies, though those choices may affect advertising behavior.
Your choices
You can use the calculators without entering any identifying information. Keep confidential business records out of shared devices if other people can view the page. Use browser settings to manage cookies and clear browsing data. The calculator itself does not retain a history of your entries.
Policy scope
This policy describes the static calculator site and its current code. It does not describe the practices of external official source websites. Review this page again if the site begins serving third-party advertising.