Cookie policy

Essential storage

Updated October 12, 2026. The contact form uses a session cookie named trp_session for submission validation and temporary form feedback. The calculators themselves do not require cookies.

Your analytics choice is stored in browser local storage as trp_analytics_consent. It remembers your decision on later visits. Clearing browser storage removes this preference.

Optional analytics cookies

Google Analytics may set cookies such as _ga and _ga_… after you choose “Allow analytics.” These support measurement of site usage. The script is not loaded merely because you continue browsing.

You can change your choice using Analytics preferences in the footer. Declining blocks subsequent analytics collection through this site and removes accessible Google Analytics cookies for this site. It does not erase previously processed data.

Browser controls

Your browser can also clear or block cookies and local storage. Blocking all storage can affect contact-form validation or prevent your preference being remembered. Read the privacy policy for details about analytics and messages.