Cookie Policy
Last updated: 15 September 2026
This page describes the browser storage used by the current site and the advertising setup being prepared for Google AdSense review.
Nothing analytics-related runs before you agree
The two Google Analytics cookies below are not written when you first arrive. Until you press Accept on the cookie notice, your browser does not contact Google at all. If you press Reject, or simply never choose, they are never written and the site works exactly as it does otherwise.
What can be stored
| Name | Type | Set by | Purpose | Lifetime | Needs consent |
|---|---|---|---|---|---|
_ga | Cookie | Google Analytics | Tells one browser apart from another so visits can be counted rather than page loads. | 180 days | Yes |
_ga_J2GNWC6CH4 | Cookie | Google Analytics | Holds the state of the current analytics session for this specific property. | 180 days | Yes |
fec_consent | Local storage | This site | Remembers whether you accepted or rejected, so you are not asked on every page. Never leaves your device. | 12 months | No, strictly necessary |
__cf_bm | Cookie | Cloudflare | Bot filtering, where our host applies it. Distinguishes automated traffic from people. Not used for analytics or advertising. | 30 minutes | No, strictly necessary |
The theme local-storage preference remembers a light or dark appearance you choose until you clear site data. Hosting or dashboard-level integrations must also be checked against the deployed configuration; their presence is not established by this page’s source code.
AdSense review and planned advertising storage
Advertising is currently disabled. Our ads.txt file is a public publisher-authorisation record, not a tracking script or cookie.
If ads are activated later, Google and selected advertising partners may use cookies and similar technologies for ad delivery, measurement, fraud prevention and, with the required consent, personalisation. Storage varies by the ad services, region and choices in use. See Google's cookie information for examples and lifetimes. We will update this notice for the deployed configuration before activating ads.
The site's present cookie notice controls Google Analytics only. Advertising choices will be handled separately through the applicable advertising consent and opt-out controls, including Google's certified message for the EEA, UK and Switzerland. Accepting analytics does not consent to advertising. Publishing a consent-message configuration in AdSense does not itself install that message on this site.
Changing your mind
Use the button below at any time. Rejecting clears the Google Analytics cookies from this browser immediately.
You can also block or delete cookies in your browser's own settings. Doing so will not break the calculators, because none of them depend on cookies.
Questions
Email [email protected]. See also the privacy policy.