Privacy Policy

Last updated: July 26, 2026

This policy explains what data CalcNest handles — which is very little by design.

Your calculations stay on your device

Every calculator and converter on this site runs in your browser using JavaScript. The numbers, dates, text, and passwords you enter are processed locally and are never transmitted to our servers, stored by us, or visible to us. You can verify this by loading a page and disconnecting from the internet — every tool keeps working.

What we store in your browser

If you toggle dark mode, we save that single preference in your browser's local storage so the site remembers it. That's the only thing we store, it never leaves your device, and clearing your browser data removes it.

Hosting logs

Like virtually all websites, our hosting provider may keep standard server logs (IP address, page requested, browser type, timestamp) for security and reliability. These logs are not used to identify visitors and are retained only as long as the host's standard policy requires.

Advertising and analytics

If advertising is enabled on this site, Adsterra may process IP address, device and browser information, ad impressions, and ad interactions under its own policies. Where required by law, personalized advertising is delayed until the required consent is recorded. See Adsterra's Privacy Policy and Cookies Policy.

Children's privacy

The site is a general-audience reference tool and does not knowingly collect personal information from anyone, including children under 13.

Contact

Privacy questions: [email protected].