Privacy policy

Short version: this site has no accounts, no forms, and collects nothing you type — because there's nowhere to type. The calculator runs entirely in your browser and sends nothing to our server. The details:

What we collect directly

Standard web-server logs (IP address, user agent, pages requested, timestamps) kept for security and debugging, rotated on a normal schedule. That's the complete list — no analytics profiles, no email capture, no tracking pixels of our own.

Third parties, when enabled

Advertising. If display ads are active, they're served by Google AdSense, which may use cookies (including the DoubleClick cookie) to show ads based on prior visits to this and other sites. You can opt out of personalized advertising at Google Ads Settings, and learn how Google uses data at policies.google.com.

Affiliate links. Some outbound links to retailers include an affiliate tag; the destination site sets its own cookies under its own policy. These links are disclosed on pages that carry them — see the affiliate disclosure.

Fonts. Typefaces load from Google Fonts, which receives the standard technical request data involved in serving a file.

Cookies

We set none of our own. Third-party cookies appear only through the services above, only when they're enabled, and are governed by those companies' policies.

Email

If you email us, we keep the correspondence to answer you and for our records. We don't add you to lists (there are no lists) or share your address.

Your choices & rights

Browser-level cookie blocking and the Google opt-out above cover the advertising layer. Depending on where you live (GDPR, CCPA/CPRA and similar), you may have rights to access or deletion of personal data — given how little we hold, an email to [email protected] resolves these quickly.

Changes

Material changes to this policy will update the effective date above.