What cookies we use
ExactMaterials sets no advertising or tracking cookies of its own. The cookies that may be placed on your device come from Google Analytics. The site shows no ads today and has no consent banner, so in the EEA, the UK and Switzerland, where consent is required, no analytics cookies are set either.
Categories
Strictly necessary. None are set by us. Cloudflare may set a security cookie to protect the site from abuse. These cannot be switched off.
Local storage (not a cookie). We store the last values you typed into a
calculator in your browser's localStorage, under keys beginning with
em:. This never leaves your device and is not readable by us or by any third
party. Clearing your browser data removes it.
Analytics. Google Analytics 4 sets _ga and
_ga_<container-id>, which expire after 2 years and distinguish one
visitor from another without identifying you. In the EEA, the UK and Switzerland they are
not set, because consent is required there and the site does not ask for it while it shows
no ads; elsewhere they are set by default.
Advertising. No ads are shown on the site today, so no advertising
cookies are set. Once ads run, Google AdSense and its partners may set cookies such as
IDE, test_cookie, __gads and __gpi,
with lifetimes from a few minutes to 13 months, used to serve, cap and measure
advertising. In the EEA, the UK and Switzerland they would only be set after you consent to
advertising storage in a consent banner; elsewhere they would be set by default. If you
declined, ads would still be shown but would be non-personalised.
Consent record. None today: there is no consent management platform while no ads are shown. Once ads run, it will store your choice so you are not asked again on every page.
Web beacons (pixels). Google Analytics and Google's advertising also use web beacons, sometimes called pixel tags or pings: small requests that tell Google a page, an event or, once ads run, an ad was seen. Nothing is stored on your device by the beacon itself, but each request carries your IP address and browser details, as any request on the internet does. In the EEA, the UK and Switzerland, Google's tag reads and writes no analytics cookies and sends only cookieless pings.
| Category | Set by | Lifetime | Needs consent |
|---|---|---|---|
| Security | Cloudflare | Session to 30 days | No |
| Local storage | This site, on your device | Until you clear it | No — never transmitted |
| Analytics | Google Analytics 4 | Up to 2 years | Yes, in the EEA, UK and Switzerland, where they are not set |
| Advertising | Google AdSense and partners, once ads run | Minutes to 13 months | Not set today: no ads are shown |
| Consent record | Google consent platform, once ads run | Up to 13 months | Not set today: no consent platform |
| Web beacons (pixels) | Google Analytics 4; Google AdSense once ads run | Not stored on your device | Cookieless in the EEA, UK and Switzerland |
How to change your mind
There is no consent panel today, because the site asks for no consent while it shows no ads. You can block or delete cookies through your browser settings at any time; the calculators will continue to work normally. Once ads run, a "Cookie settings" link in the footer of every page will reopen the consent panel so you can change or withdraw your choice.
More information
Google explains how it uses cookies in advertising at https://policies.google.com/technologies/ads and how Analytics uses cookies at https://policies.google.com/technologies/cookies .