Privacy Policy

Effective date: July 4, 2026

The short version

Every calculator on NumKits runs entirely in your web browser. The numbers, dates, and text you enter are processed on your own device and are never transmitted to, or stored on, our servers. We do not require accounts, we do not collect personal information through our tools, and we do not sell data.

Your calculator inputs

When you use a tool on this site — for example, entering a salary, a loan amount, a weight, or a birth date — that information stays in your browser. Our pages are static files; there is no backend that receives your inputs. Closing the tab discards everything you typed.

Cookies and advertising

This site may display advertisements served by Google AdSense. Google, as a third-party vendor, uses cookies to serve ads based on your prior visits to this and other websites. Google's use of advertising cookies enables it and its partners to serve ads to you based on your visits to this site and/or other sites on the Internet.

You may opt out of personalized advertising by visiting Google Ads Settings. You can also opt out of some third-party vendors' use of cookies for personalized advertising at www.aboutads.info. For more detail on how Google uses data from sites that use its services, see Google's partner sites policy.

Analytics

We may use privacy-respecting, aggregate analytics to understand which tools are popular (for example, page-view counts). This data is aggregated and cannot be used to identify you personally. We do not track individual users across sites.

Links to other sites

Some pages link to external websites. We are not responsible for the privacy practices or content of those sites, and this policy applies only to NumKits.

Children's privacy

This site does not knowingly collect any personal information from anyone, including children under 13. Our tools require no sign-up and store no personal data.

Changes to this policy

If we change this policy, we will update this page and the effective date above. Material changes will be noted prominently.

Contact

Questions about this policy? Reach us via the contact page.