Cookie and storage notice

Last updated: 25/10/2026

This site sets no cookies. There are no adverts, no analytics and no tracking, so there is no cookie banner. Nothing needs your consent.

Local storage we use

The site saves a few settings on your own device, in your browser’s local storage. They are never sent to us or anyone else.

Name	Purpose	Lasts
lc-units	Remembers metric or imperial, once you press the units button.	Until you clear site data
lc-mode	Remembers Simple or Detailed mode, once you press the mode button.	Until you clear site data
lc-machine, lc-machine-custom	Remembers the machine you picked, or the details you typed in for your own machine.	Until you clear site data
Offline cache (service worker)	Keeps copies of the site’s pages and files so the calculators load quickly and work offline.	Until you clear site data

Under the Privacy and Electronic Communications Regulations (PECR, reg. 6), storage that is strictly necessary to provide a service you have asked for doesn’t need consent. These settings exist only to remember choices you made and to make the site work, so they fall within that exemption. None are used for tracking, analytics or advertising. You can delete them at any time by clearing this site’s data in your browser settings.

Our host

Our host, Cloudflare, may occasionally set a strictly necessary security cookie, for example during a bot-protection check. It is used only to protect the site. See Cloudflare’s cookie policy.

Changes

Date	Change
25/10/2026	Notice rewritten: no adverts, analytics or tracking cookies; preferences kept in local storage only.
25/10/2026	Consent tool added (switched off while there is nothing that needs consent).