Website information

Cookies and local storage

Optional Google Analytics is disabled until you select Allow analytics. Decline analytics keeps Google tracking unloaded. Analytics preferences in the footer lets you withdraw; our code removes this site’s Google Analytics cookies on withdrawal. A local-storage preference is kept for up to 180 days. If allowed, Google Analytics cookies are set for up to 60 days; browser settings may shorten their lifetime. We do not enable advertising pixels or personalised advertising. The interactive tools run in your browser. Calculation inputs stay in your browser and are not sent to our server. You can choose to copy a result into an email. An email link opens your own email app; you decide what to send.