CoffeeCutoff provides estimates for general guidance only. All calculations happen in your browser; no calculator input is stored on our servers.
The service does not provide medical advice. Caffeine metabolism varies between individuals, and you are responsible for decisions made based on the results.
CoffeeCutoff uses Google Analytics 4 to understand page visits, completed calculations, and result shares. Analytics may collect browser and device information, approximate location, referring pages, and set cookies such as _ga. We disable Google advertising signals and do not send bedtime, coffee time, drink, quantity, sensitivity, calculated results, or URL query parameters to Analytics.
Google processes Analytics data under its Privacy Policy. You can opt out with the Google Analytics Opt-out Browser Add-on.