Privacy policy
Last updated July 2026.
Calculator inputs
The calculators on this site run entirely in your browser. Wattages, hours, rates and duty cycles you enter are processed locally in JavaScript and are never transmitted to our servers. We do not store them, and we have no way to see them.
Server logs
Our web host records standard access logs, which include IP address, requested URL, referring page, user agent and timestamp. These are used for security and to diagnose technical faults, and are retained for a limited period.
Local storage
We store your light or dark theme preference in your browser’s local storage so the site remembers it. This never leaves your device and contains nothing identifying.
Your rights
Depending on where you live, you may have rights to access, correct or delete personal data held about you. Because we do not operate user accounts and do not collect calculator inputs, the only data we hold is in server logs and any third-party analytics or advertising described above. Contact contact@costtorunit.com with requests.
Children
This site is intended for general audiences and is not directed at children under 13.
Changes
If this policy changes we will update the date at the top of this page. Questions: contact@costtorunit.com.