Privacy Policy

Calculator Dude (“we”, “us”, “the site”) operates the website at calculatordude.com, a free library of educational calculators. This Privacy Policy explains what limited information we collect when you visit, why we collect it, and the choices you have.

We built this site to be the opposite of the data-hungry web. There are no advertising networks, no third-party retargeting pixels, and nothing for sale. The sections below describe the small amount of data we do handle.

We collect two narrow categories of information:

• Anonymous usage analytics. If you consent, we use Google Analytics 4 to record aggregate events such as which page you viewed and roughly which region you visited from. IP addresses are anonymized and we do not attempt to identify individual visitors.
• Your consent choice. When you accept or reject analytics in the cookie banner, we store that single choice in your browser so we do not ask again on every visit.

We do not ask for your name, email, or any account details, because the site has no accounts and no sign-up.

Every number you type into a calculator is processed entirely on your device using JavaScript that runs in your browser. The values in input fields are never sent to our servers, never logged, and never stored. When a calculator puts your inputs into the page URL so you can share a result, that link lives only in your address bar until you choose to share it.

The anonymous analytics data is used only to:

• understand which calculators are most useful so we can improve them;
• spot pages that load slowly or error out;
• decide which new calculators to build next.

We never use this data to build advertising profiles, and we never combine it with information from other sources to identify you.

For visitors in the United Kingdom and European Economic Area, our legal basis for processing analytics data is your consent, which you give through the cookie banner and can withdraw at any time. Where we process the strictly necessary consent record itself, our basis is our legitimate interest in remembering your preference so the banner does not reappear on every page.

We use a minimal set of cookies and a single local-storage key. The full breakdown, including names and durations, is in our Cookie Policy. Analytics cookies are set only after you accept them. We use Google Consent Mode v2, which means analytics stays disabled until you opt in.

We do not sell, rent, or trade any data. The only third party that receives data is Google, as our analytics processor, and only the anonymized event data described above, and only if you have consented. Google processes that data on our behalf under its own data-processing terms.

Aggregate analytics data is retained in Google Analytics for up to 14 months, after which it is automatically deleted. The consent choice stored in your browser persists until you clear your browser data for calculatordude.com.

Depending on where you live, you may have the right to access, correct, or delete personal data we hold about you, and to object to or restrict its processing. Because we collect only anonymous analytics and store no account data, in practice the most direct way to exercise these rights is to:

• withdraw consent by clearing site data for calculatordude.com;
• use your browser or operating system controls to block analytics;
• contact us with any specific request using the button below.

Calculator Dude is a general-audience reference site and is not directed at children under 13. We do not knowingly collect personal information from children. Because we collect no account data and only anonymous analytics, the site does not build profiles of any visitor, regardless of age.

If we change how we handle data, we will update this page and revise the “Last updated” date at the top. Material changes will be reflected in the cookie banner so returning visitors can review their choice.

For any privacy question or request, use the contact button at the bottom of this page or on the editor's page. We read and respond to every message.