Cookie Policy

Last updated: 21 August 2026

What cookies are

Cookies are small text files stored by your browser. They let a site remember things between page loads.

Cookies this site uses

Essential. A session cookie keeps administrator logins secure. Without it the admin area cannot function. It sets no tracking identifier and expires when the browser closes.

Analytics. If Google Analytics is enabled, it sets cookies to measure page views and how visitors move through the site. This data is aggregated.

Advertising. If Google AdSense is enabled, Google and its partners may set cookies to select adverts, limit how often you see the same one, and measure performance. These may be used for personalised advertising.

Managing cookies

Every major browser lets you block or delete cookies through its settings. Blocking essential cookies will prevent the admin area from working, but the public calculators will continue to function normally.

To control personalised advertising specifically, use Google's Ads Settings, or the industry opt-out tools at aboutads.info and youronlinechoices.eu.

Changes

We will update the date above whenever this policy changes.