How we use cookies.

We only set analytics or advertising cookies once you agree to them. You can accept, reject or change your choice at any time using “Cookie settings” in the footer of any page — it reopens the same choice shown on your first visit.

Strictly necessary

We do not set any cookies to run the calculators themselves. Your inputs and results stay in your browser and are never saved.

Analytics (optional)

With your consent, Google Analytics sets cookies to distinguish visitors and measure how the site is used in aggregate, so we can see which calculators are useful. Until you accept, Google’s Consent Mode keeps this cookie-free: your visit is still counted, but without an identifying cookie.

Advertising (not yet active)

We intend to show ads through Google AdSense to help cover hosting costs; this is not switched on in the current version of the site. When it is, advertising cookies will only be set if you accept them here, and you will be able to choose non-personalised ads or none at all.

Changing your choice

Select “Cookie settings” in the footer of any page to reopen the cookie banner and change your choice. Rejecting cookies does not stop you using any calculator.

More about these cookies

Google explains its own cookies at policies.google.com/technologies/cookies, and you can opt out of Google Analytics across sites using Google’s browser add-on.