Cookies
Cookie list
| Cookie | When used | Purpose |
|---|---|---|
__cf_bm and similar Cloudflare security cookies |
When Cloudflare sets them | Bot detection and security processing |
_ga |
Only if Google Analytics 4 is enabled | Analytics identification |
_ga_* |
Only if Google Analytics 4 is enabled | Analytics session or property measurement |
Cookie availability and lifetimes can vary with service configuration. Use browser settings to inspect, block, or delete cookies. Blocking a security cookie may affect access. Calculator entries are also saved in the page URL as you interact with the tool; a URL is not a cookie, but sharing it shares those values.
See the privacy policy for server logs, Cloudflare, analytics, and rights requests.
Last updated: September 24, 2026