Privacy Policy

Your privacy matters. This policy explains what happens when you use Calculator Den. It was last updated in August 2026.

Your calculations stay on your device

All calculators run in your browser. The numbers you type are processed locally and are not sent to, or stored on, our servers. We never see the values you enter.

Analytics

We use Google Analytics (GA4) to understand which calculators people find useful and how the site is performing overall. It records aggregated, non-identifying information such as pages viewed, rough location by country or city, device type and how visitors arrive. It does not tell us who you are, and it does not receive the numbers you type into any calculator. Google may set cookies to measure this. You can opt out across all sites using Google's official Analytics opt-out add-on.

We also use Yandex Metrica to understand how the site is used and to help search engines discover new pages faster. It may record anonymised, aggregated usage such as pages viewed, clicks, device type and rough location, and it includes session-replay (Webvisor) and heatmap features that capture on-page interactions like clicks and scrolling so we can improve the layout. It does not capture the numbers you type into any calculator, and we do not use it to identify you. Metrica may set cookies; you can block or delete cookies in your browser, and you can read Yandex's own privacy information on their website.

Advertising

We may display advertising through third-party networks such as Google AdSense in future. When we do, these providers may use cookies to serve and measure ads, including personalised ads based on your prior visits to this and other websites. You can manage this through Google's Ads Settings.

Cookies

Cookies are small files a site can store in your browser. We use them only for the analytics described above, and third parties may use them for advertising. You can block or delete cookies in your browser settings; the calculators will still work.

Your choices

You can disable cookies, use the Google Analytics opt-out, and opt out of personalised advertising through your ad provider's controls. None of this stops the calculators from working.

Contact

Questions about this policy? Email hello@calculatorden.com.