Cookie Policy

Last updated: April 2026

What Are Cookies?

A cookie is a small text file that a web server saves on your computer or mobile device when you visit a website. Cookies are widely used to make websites work more efficiently and to provide information to the site owner.

Cookies are unique to your browser. They typically contain a site name and a unique identifier. Some cookies exist only for the duration of your browser session (session cookies); others persist for a set period after you close your browser (persistent cookies).

How We Use Cookies

Calcradar uses a minimal set of cookies. We do not use cookies to track your personal identity, and we do not use advertising or retargeting cookies of any kind.

We do not use cookies to store or access data you enter into our calculators. All calculator computations run entirely in your browser and are never transmitted to our servers.

Essential Cookies

What are essential cookies?

Essential cookies are strictly necessary for the website to function. Without them, the site would not work correctly. They cannot be disabled.

What essential cookies do we use?

__Host-next-auth.csrf-token — Prevents cross-site request forgery attacks. Session cookie.
__Secure-next-auth.callback-url — Stores the URL to redirect to after sign-in (if applicable). Session cookie.
next-locale — Remembers your language preference. Persistent, 1 year.

What data is collected?

Essential cookies do not collect personally identifiable information. They store only technical values needed for the site to function correctly.

Analytics Cookies

What are analytics cookies?

Analytics cookies (also called performance or statistical cookies) help us understand how visitors interact with our site. They tell us which pages are most popular, how long people spend on each page, and whether users encounter errors. This helps us improve the site.

Google Analytics

We use Google Analytics to collect aggregated, anonymised usage statistics. Google Analytics sets the following cookies:

_ga — Distinguishes unique users. Persistent, 2 years.
_ga_* — Stores session state. Persistent, 2 years.
_gid — Distinguishes unique users. Persistent, 24 hours.

We have configured Google Analytics with IP anonymisation enabled. We do not allow Google to use our analytics data for advertising purposes. Google may process data on servers in the United States; this is covered by standard contractual clauses.

What data is collected?

Analytics cookies collect anonymised information such as: pages visited, time spent on pages, approximate location (country level), browser and device type, and whether you are a new or returning visitor. No personally identifiable information is collected.

How long is data retained?

Analytics data is retained in Google Analytics for a maximum of 14 months, after which it is automatically deleted.

No Advertising Cookies

Calcradar does not use advertising cookies, retargeting cookies, or any third-party marketing trackers. We do not build profiles of your interests for advertising purposes, and we do not share your browsing data with ad networks.

Local Storage

In addition to cookies, we may use browser local storage to save small amounts of data on your device. Local storage works similarly to cookies but the data is never automatically sent to our servers.

Why do we use local storage?

To remember UI preferences (e.g., your last-used unit system in a calculator) between visits.
To improve the speed of the site by caching lightweight data locally.

How to clear local storage

You can delete local storage data at any time through your browser settings. In most browsers, this is found under Settings → Privacy & Security → Clear browsing data → check “Cached images and files” or “Site data”.

Managing Cookies

You can control and delete cookies through your browser settings. Instructions for the most popular browsers:

Google Chrome — Settings → Privacy and security → Cookies and other site data
Mozilla Firefox — Settings → Privacy & Security → Cookies and Site Data
Safari — Preferences → Privacy → Manage Website Data
Microsoft Edge — Settings → Cookies and site permissions
Opera — Settings → Privacy & security → Cookies

Please be aware that disabling essential cookies may prevent parts of the website from functioning correctly. Disabling analytics cookies will not affect your browsing experience.

Opting out of Google Analytics specifically

You can prevent Google Analytics from collecting data about your visits by installing the Google Analytics Opt-out Browser Add-on.

Changes to This Policy

We may update this Cookie Policy from time to time to reflect changes in the cookies we use or for other operational, legal, or regulatory reasons. We will update the “Last updated” date at the top of this page whenever we make changes.

Contact Us

If you have any questions about our use of cookies, please contact us:

Email: privacy@calcradar.com
Website: calcradar.com/cookie-policy