Privacy

Calculator inputs are processed in your browser by the pages generated for this site. DateCalc.org does not require an account to use its calculators.

Server and third-party data

Like most websites, hosting infrastructure may record request information such as IP address, browser details, requested URL, and timestamps for security and reliability. If advertising or analytics is enabled, those providers may process data under their own policies.

Sensitive inputs

Do not enter confidential or personally identifying information into free-form fields. The tools are intended for general calculations, not for storing medical, payroll, or financial records.