Optional Google Analytics does not load until you choose Accept analytics. You can decline it without losing site functionality and reopen Cookie settings from the footer at any time.
Consent preference
The site stores tcgg_analytics_consent_v1 in your browser's local storage so it can remember whether you accepted or declined analytics on that device. This preference is necessary to apply your choice. The calculator and worksheet do not store their entries.
Google Analytics cookies
If you accept, Google Analytics measurement ID G-HKEMXXE9CL may set _ga to distinguish visitors and _ga_HKEMXXE9CL to maintain session state. Google documents a default lifetime of up to two years for both cookies, subject to browser limits and the property's cookie settings. See Google's GA4 cookie reference. The site disables advertising storage, advertising personalisation and Google signals.
Choosing Decline analytics prevents the Google tag from loading before consent. If you later withdraw consent, the site tells Google Analytics to stop collection and attempts to remove its analytics cookies from this domain.
Cloudflare security cookie
The live hosting and security layer may set Cloudflare's strictly necessary __cf_bm cookie to identify and mitigate automated traffic. Cloudflare says it contains encrypted bot-management information, is not tied to a user ID and expires after 30 minutes of continuous inactivity. See Cloudflare's cookie documentation.