Privacy Policy

CalcHub provides free online calculators and conversion tools. No account registration is required to use our core features. We never collect sensitive personal information (such as passport details, payment cards, or financial credentials). All mathematical calculations are executed directly within your web browser (Client-Side).

When you interact with the service, the following technical data may be processed:

• Technical details: browser type and version, operating system, language preferences, and screen resolution;
• Server logs: IP address, date and time of request, and pages visited (strictly used for technical reliability and DDoS prevention);
• Local storage (HTML5 localStorage): preserving your bookmarked favorites directly on your own device;
• Anonymized analytics metrics: aggregated page views, load times, and performance diagnostics.

Data is processed strictly for the following purposes:

• Ensuring reliable, lightning-fast execution of online interactive tools;
• Retaining your preferences (favorites list, preferred UI language);
• Protecting infrastructure integrity and preventing malicious activity;
• Evaluating tool popularity to build new calculators users actually need.

We utilize HTTP cookies and browser localStorage to remember preferences and track aggregate usage. For detailed information on controlling cookies, please review our Cookie Policy.

Under applicable data protection laws, including the GDPR, you have the right to:

• Request information on the data processed about you;
• Request the deletion of any stored personal data;
• Clear your browser's local cache or disable cookies entirely in browser settings;
• Lodge a complaint with a supervisory data protection authority.

We may update this Privacy Policy from time to time. The latest version will always be available on this page. If you have any inquiries, feel free to contact us via our site contacts.