Privacy
Calculations happen in your browser. The page address may contain inputs. Shared analytics excludes those inputs from its measurements.
What stays on your device
- Your inputs. As you use a calculator, its current values are written into the page's URL (the address bar) so you can bookmark or share a result, and into your browser's local storage so the calculator remembers your last values when you come back. A "Reset" clears both. A shared link contains these inputs; avoid putting private information in a shared address.
- Your preferences. Theme, accent colour, page layout, and whether the sources panel is open are kept in local storage on your device.
- Pages for offline use. The site can be installed as an app; when it is, a service worker caches pages you have visited so they open offline.
What the site sends
- Page requests and the search index, fetched from this site's own domain.
- Configured analytics sends a sanitized page path and external referrer origin, excluding calculator inputs, URL queries and page titles.
- After you interact with a calculator page, one Google AdSense advertisement may load: a vertical unit on desktop or a horizontal unit at the bottom on smaller screens.
- This deployment has no feedback form enabled, so no feedback is collected.
- This deployment has no embed-notification form enabled, so no email address is collected.
- Share buttons are plain links to the platform you pick. Nothing is sent to that platform until you click, and the link you share carries your calculator inputs in its address.
Traffic measurement and optional analytics
Umami counts pageviews, visits and estimated visitors using our own server without analytics cookies. Where regional policy permits first-party measurement, it can count a visit without a click and independently of optional Google consent. Its collector uses salted network/browser information for estimates; blocked visits and visitor estimates are not exact people counts.
Google Analytics loads only after valid analytics consent. It sends no measurements while your choice is unresolved or denied. Use Privacy settings to withdraw optional consent at any time.
GPC and Do Not Track block first-party traffic measurement. You can also disable it separately in this browser:
How storage and providers work
Use the privacy choices on this page to change optional analytics and advertising settings. Advertising loads only after you allow it and interact with a calculator page.
- Optional Google analytics storage or cookies follow your analytics choice and Google's policies.
- Fonts ship with the site; configured analytics and advertising are optional external integrations.
- Every result is computed on your device. Values you type are not sent to a calculation server.
About Calc explains who publishes the site and how to report a mistake.