This is a translation. The German version is legally binding.

Privacy policy

1. Controller

Lukas-Domenik Sonnenfeld, Anschrift siehe Impressum, Germany, email: sunfieldsupport@gmail.com

2. In short

This website sets no cookies, uses no analytics or tracking tools and loads no third-party scripts or fonts. The calculator runs entirely in your browser; your measurements are not transmitted. Only if you choose “Save in this browser” does your browser store your project locally (localStorage); “Delete saved project” removes it again. A shared link contains the measurements in the part after the #, which is not sent to the server.

3. Hosting

The website is hosted by Cloudflare, Inc., 101 Townsend St., San Francisco, CA 94107, USA. Each time a page is requested, Cloudflare processes technically necessary data (IP address, date and time, page requested, browser and system information, referrer) to deliver the page and prevent misuse. Legal basis: Art. 6(1)(f) GDPR. Data may be transferred to the USA; according to Cloudflare, this is based on the EU Commission's standard contractual clauses or the EU-US Data Privacy Framework.

4. Your rights

You have the right of access, rectification, erasure, restriction of processing, data portability and objection (Art. 15–21 GDPR) and the right to lodge a complaint with a supervisory authority. Contact us at the email address above.

Last updated: November 2026