Privacy policy

Last updated: October 2026

Overview

Calcinum (https://calcinum.com) is a free online calculator website. We take your privacy seriously. This policy explains what data we collect, how we use it, and your rights.

What we collect

Calculator usage

We do NOT store any numbers you enter into our calculators. All calculations run entirely in your browser using client-side JavaScript. No salary, tax, or financial data is ever sent to our servers. If you use the Save button, a copy is kept in your own browser, see Data stored in your browser below.

Analytics

We use Google Analytics (measurement ID: G-BEKW2FECCS) to understand how visitors use our site. This collects: pages visited, time on page, device type, browser, approximate geographic location (country/region level), and referral source. Google Analytics uses cookies. You can opt out using browser settings or the Google Analytics opt-out browser add-on.

Contact form

If you submit our contact form, we collect your name, email address, and message. This data is processed by Web3Forms and delivered to us via email. We use it only to respond to your inquiry and do not share it with third parties.

Cookies

Outside the regions noted below, we use cookies for Google Analytics (analytics) and for advertising served by Google AdSense. Third-party vendors, including Google, use cookies to serve ads based on your prior visits to this website or other websites. Google's use of advertising cookies enables it and its partners to serve ads to you based on your visits to this site and/or other sites on the Internet. You can opt out of personalized advertising in your Google Ads Settings, or opt out of a third-party vendor's use of cookies for personalized advertising at aboutads.info. Visitors in the EEA, UK, and Switzerland are not served any advertising or analytics. Because we do not operate a consent management platform, we do not load Google Analytics or Google AdSense for visitors detected in those regions, and no analytics or advertising cookies are set for them.

Data stored in your browser

Some calculators offer a Save button. If you use it, we store that calculation in your browser's local storage under the key calcinum_saved, so you can revisit it on the Saved calculations page.

What is saved

The label you type, the values you entered into that calculator, the result it produced, the page address and title, and the date you saved it. Because the values you entered are included, a saved calculation may contain figures such as your salary, loan balance, or tax details.

Where it goes

Nowhere. Local storage never leaves your device, and this data is not transmitted to us, to our hosting provider, or to any third party. It is not accessible to other websites. Anyone with access to your browser profile on that device can read it, so avoid saving sensitive figures on a shared or public computer.

How long it is kept

Until you delete it. There is no expiry. We keep the 50 most recent saved calculations; saving more discards the oldest. Nothing is saved unless you press Save.

How to remove it

Delete individual entries, or clear them all, from the Saved calculations page. Clearing your browser's site data for calcinum.com removes them too. Uninstalling or resetting your browser has the same effect.

What we do NOT collect

Third-party services

Your rights

Children's privacy

Our site is not directed at children under 13. We do not knowingly collect personal information from children. If we learn that we have collected data from a child under 13, we will delete it promptly.

Changes to this policy

We may update this policy from time to time. The "last updated" date at the top reflects the most recent revision. Continued use of the site after changes constitutes acceptance of the updated policy.

Contact

For privacy-related questions, use our contact form.