Mainframe Calculator is a browser-based tool. All calculations run entirely in your browser. No values you type into the calculator are sent to any server, stored anywhere, or shared with any third party.
This site does not currently use analytics or tracking scripts. If analytics are added in the future, this policy will be updated to describe what data is collected, how it is used, and how long it is retained.
This site intends to display advertisements through Google AdSense to help cover hosting and maintenance costs. When advertising is active, Google may use cookies to serve ads based on your prior visits to this and other websites. You can opt out of personalized advertising by visiting Google's Ads Settings.
Advertisements are clearly separated from the calculator tool and from the reference content on this site.
The Resources and Reference sections may include affiliate links. When a product or book is recommended with an affiliate link, it will be clearly labeled. Clicking an affiliate link and making a purchase may result in a small commission at no additional cost to you.
This site itself does not set cookies. If advertising or analytics are enabled in the future, those third-party services may set cookies subject to their own privacy policies.
For any questions about this privacy policy or how your information is handled, contact [email protected].
Mainframe Calculator is a free tool. Advertising helps keep it free and available to everyone who needs it.
When advertising is active, ad units will appear in clearly designated areas of the page — separate from the calculator and the reference content. The tool itself will always be fully usable without interacting with any ad.
If you have questions or concerns about a specific advertisement, contact [email protected].
Email: [email protected]
This site is maintained by a single developer. Response times may vary, but all legitimate questions and feedback are read.