What this page covers
This page explains every cookie that may be set when you visit GradeCalculators.org. For the broader privacy story (analytics, data we do and do not collect, children's privacy), see our Privacy Policy.
First-party cookies
Our own code does not set any cookies. Calculator state lives in
your browser's memory (or, when noted, in localStorage) and is never
synced to our servers. Theme preference, when toggled, is stored client-side
via localStorage rather than a cookie.
Third-party functional cookies
The site is served through Cloudflare, which may set the following functional cookies to protect against abuse and keep the CDN running:
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__cf_bm: bot-management cookie set by Cloudflare. Lifespan: 30 minutes. Purpose: separating real visitors from automated traffic. -
cf_clearance: set when Cloudflare's challenge needs to verify a visitor. Lifespan: up to 30 days.
These are functional cookies necessary for site security. They contain no personal information about you and are not used for advertising or tracking across other sites. Cloudflare publishes the full list at developers.cloudflare.com/fundamentals/reference/policies-compliances/cloudflare-cookies/.
Analytics
We use Cloudflare Web Analytics, which is privacy-first by design and does not set cookies. It collects only aggregate page-view data (URL, referrer, country, browser type) and never identifies an individual user.
Advertising cookies (Google AdSense)
The site uses Google AdSense to show ads. Google and its partners may set or read cookies to serve ads, cap how often you see the same ad, measure ad performance, and detect fraudulent clicks. Some are stored under our domain and some under Google's domains:
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__gadsand__gpi: set by Google under our domain. Lifespan: up to 13 months. Purpose: ad delivery, frequency capping, and measurement. -
__eoi: set by Google under our domain. Lifespan: up to 6 months. Purpose: spam and fraud prevention for ads. -
IDE,DSID,test_cookie, and similar: set on Google's own domains (such as doubleclick.net). Purpose: personalized ads and ad measurement across sites.
Third-party vendors, including Google, use these cookies to serve ads based on your prior visits to this site or other websites. You can turn off personalized ads in Google Ads Settings or through aboutads.info. Google's full list of advertising cookies is published at policies.google.com/technologies/cookies. Visitors in the European Economic Area, the UK, and Switzerland are asked for consent before advertising cookies are used for personalization.
How to control cookies
Browser controls let you block or delete cookies for any site. Blocking the Cloudflare functional cookies above may trigger a security challenge on each visit but does not break the calculators themselves.
Contact
Questions about the cookies on this site, see the contact page.