This site has one contact form and nothing else. No account system, no newsletter, no advertising network. This page says exactly what is collected.

The contact form asks for what you choose to put in it. Whatever you send is stored on this website and emailed to a monitored inbox so it can be answered. It is not sold, rented or passed to any third party.
Like any web server, this one records ordinary request information: the pages requested, the time, the browser user agent and the network address the request came from. That data is used to keep the site working and to understand which pages are read.
The calculators on this site run entirely in your browser. The numbers you enter are not sent anywhere and are not stored between visits. WordPress and the hosting platform may set functional cookies needed to serve the pages.
Web fonts are loaded from Google Fonts, which means your browser makes a request to Google to fetch them. Photographs are served from this site rather than from a third party.
California residents have rights under the California Consumer Privacy Act, including the right to know what personal information a business has collected and the right to request its deletion. Because this site does not collect personal information through any form, there is in practice nothing held about you beyond server logs.
Form entries are kept so the question can be answered and so a later message makes sense in context. If you want what you sent deleted, say so through the form and it will be removed.
If this policy changes, the revised version replaces this one on this page.