Last updated: 14 October 2026

Privacy Policy

This policy explains what information this website collects and how it is used.

Information we collect directly

This website has no accounts, no sign-up forms and no comment system. The reference tables run entirely in your browser: values you type into a search box are never sent to us and are not stored on our servers.

If you email us using the address on the contact page, we will hold your message and email address only for as long as it takes to reply and deal with the matter you raised.

Cookies and advertising

This site is supported by advertising. We use Google AdSense to display ads, and Google and its partners use cookies to serve them.

• Third-party vendors, including Google, use cookies to serve ads based on your prior visits to this website and/or other websites.
• Google's use of advertising cookies enables it and its partners to serve ads to you based on your visits to this site and/or other sites on the internet.
• You may opt out of personalised advertising by visiting Google Ads Settings.
• You can also opt out of some third-party vendors' use of cookies for personalised advertising by visiting www.aboutads.info.

For more detail on how Google uses information from sites that use its services, see Google's partner sites policy.

Analytics and server logs

Like most websites, requests to this site pass through a content delivery network, which may record standard technical information such as the requested page, the time of the request and the originating IP address, for security and performance purposes.

Your choices

You can block or delete cookies through your browser settings. Doing so may affect how ads are shown but will not affect your ability to use the reference tables — every table works without cookies.

Children

This site is a technical reference and is not directed at children.

Changes to this policy

If this policy changes, the revised version will appear on this page with an updated date.

Contact

Questions about this policy can be sent to the address on the contact page.