Privacy & analytics

Updated 3 October 2026.

Calculator inputs

Calculations happen in your browser. The site does not submit calculator input values to a server or Google Analytics. It has no account registration or contact form.

Website analytics

We use Google Analytics to understand visits and website usage. Google Analytics may use cookies and process technical information such as device, browser, approximate location and pages visited. The calculator_used event contains the calculator identifier; template_download contains the workbook identifier. Neither includes your engineering input values or spreadsheet records.

Google signals and advertising personalization are disabled in our analytics configuration. Browser privacy settings and extensions can limit tracking. This notice does not change your browser settings.

Downloads and external links

Excel files download to your device. Editing a downloaded workbook does not send its records back to this website. External references open third-party websites with their own privacy practices.

Google privacy policy · Google Analytics opt-out browser add-on