Effective September 10, 2026.
Calculator inputs
The calculators process your measurements in your browser. This version does not send those inputs to our servers, save them between visits or require an account. Printing uses your browser’s print dialog; your device and chosen print destination control what happens to that copy.
Website delivery and search measurement
Firebase Hosting serves the website. Normal web requests include technical information such as an IP address, requested address and browser information. Google's handling of data is described in its privacy policy.
We use Google Search Console to understand aggregate search visibility, including clicks and impressions. We do not install Google Analytics, advertising trackers or a site-specific cookie on this release.
If you contact expertoiosbv@gmail.com, your address and message are available to the site operator and the email provider. We use correspondence to respond to questions and improve the tools. Request deletion of your correspondence by emailing the same address; provider retention and applicable obligations may affect what can be removed.
External links
Reference sites have their own practices. Following a link leaves this site. For questions about this notice, email the address above.