The short version
Calculators on this site run entirely in your browser. The numbers you type into a slider or field are never sent to a server, stored in a database, or tied to your identity. There are no user accounts, no signup forms, and no email collection required to use any calculator.
Calculator inputs and the URL
When you adjust a calculator's inputs, this site writes those values into the page's URL so you can copy, bookmark, or share a link that reproduces your exact result.
That data lives in the URL itself, not in a cookie or a server-side session, and is only ever seen by whoever you choose to share the link with.
Server logs
Like virtually any web server, the infrastructure hosting this site may log standard technical information for every request, such as IP address, browser user agent, requested URL, and timestamp.
These logs are used only for security, abuse prevention, and diagnosing outages, and are not cross referenced with any calculator input you enter.
Advertising and cookies
This site is monetized through display advertising (see the ad disclosure page). Ad networks such as Google AdSense or Ezoic may use cookies or similar technologies to serve ads and measure their performance, which can include personalized advertising based on your browsing activity across sites.
These networks are independent data controllers for that activity; their own privacy policies govern what they collect and how. Google's use of advertising cookies is described at policies.google.com/technologies/ads.
You can opt out of personalized advertising from participating networks through the Digital Advertising Alliance's opt-out page.
Analytics
This site may use privacy-conscious analytics to understand aggregate traffic patterns, such as which calculators are most used, without identifying individual visitors. If that changes to include cookie-based or identity-linked analytics, this policy will be updated to say so.
Children's privacy
This site is not directed at children under 13 and does not knowingly collect personal information from them.
Changes to this policy
This policy may be updated as the site adds features or ad networks change their practices. The "last updated" date at the top of this page reflects the most recent revision.
Contact
Questions about this policy can be sent through our contact form.