Privacy Policy

ClayCalc ("the Service") is operated as a free, public ceramic engineering calculator platform. This policy explains what information we collect, how we use it, and what choices you have. By using ClayCalc you agree to the terms described here.

This policy applies to all pages at claycalc.com.

We do not require registration or login. We do not ask for your name, email address, postal address, or any other personally identifying information.

The only information we receive is what any web server receives automatically: your IP address, browser type, referring URL, and pages visited. This is standard server log data used solely for security monitoring, abuse prevention, and aggregate traffic analysis. Logs are retained for up to 30 days and then deleted.

When you submit a calculation form, the values you enter (e.g. clay dimensions, weights, temperatures) are sent to our server to compute a result. These values are used only to produce the calculation and are not stored in any database, logged, or associated with your IP address.

Your calculation inputs are yours. We do not see them, save them, or share them.

ClayCalc is funded by display advertising served through Google AdSense. Google uses cookies and similar tracking technologies to serve ads that may be relevant to you based on your browsing history across sites.

You can opt out of personalised advertising by visiting Google's Ad Settings at g.co/adsettings or by using the Network Advertising Initiative opt-out page. You can also install the Google Analytics Opt-out Browser Add-on.

Google's use of advertising cookies is governed by Google's Privacy Policy (policies.google.com/privacy). ClayCalc does not have access to any data that Google collects through its advertising cookies.

We may use Google Analytics or a privacy-respecting alternative to understand aggregate usage patterns — which calculators are used most, which pages receive traffic, and whether the site is performing correctly. If Google Analytics is used, data is collected in an anonymised form and governed by Google's privacy policy.

We do not use analytics to track individual users across sessions or devices.

ClayCalc itself sets one functional cookie: a CSRF token used to protect form submissions from cross-site request forgery attacks. This cookie contains no personal information, expires at the end of your browser session, and is strictly necessary for the site to function securely.

Google AdSense sets additional cookies for advertising purposes as described in the Advertising section above. You may disable non-essential cookies in your browser settings or via a cookie consent manager.

ClayCalc loads fonts from Google Fonts (fonts.googleapis.com) and icons from Google's Material Symbols CDN. Google may collect anonymised usage data from these requests per their own privacy policy.

No other third-party scripts, pixel trackers, social media widgets, or data brokers are used on this site.

Because ClayCalc does not store personally identifiable information, there is no personal data profile to access, correct, or delete. If you are in the EU or UK, your GDPR/UK GDPR rights (access, erasure, portability) apply to any data held by third-party processors such as Google, not to ClayCalc directly.

If you believe we have received personal data in error, contact us and we will investigate promptly.

If you have questions about this privacy policy or how your data is handled, you can contact us via the email listed on the About page. We aim to respond within 5 business days.

We may update this policy from time to time. The "last updated" date at the top of this page reflects the date of the most recent revision. Continued use of the Service after an update constitutes acceptance of the revised policy.