Privacy Policy

Last updated · July 10, 2026

This policy explains what information VastCalculators.com ("we", "us") does and does not collect when you use our free online calculators, and the choices you have.

The short version

Everything you type into a calculator — weights, loan amounts, grades — is processed entirely in your browser. Those inputs are never transmitted to, or stored on, our servers. The data collection that does happen on this site comes from standard website analytics and advertising services, described below.

1. Calculator inputs

All calculations run client-side in your browser using JavaScript. We do not receive, log, store, or share the values you enter. Refreshing the page clears them. We have no accounts, sign-ups, or profiles.

2. Analytics

We use Google Analytics 4 and Vercel Analytics to understand aggregate site usage — pages visited, approximate location (country/city level), device and browser type, and how visitors arrive. Google Analytics uses cookies and similar identifiers for this purpose. We use this data only to improve the site; we do not use it to identify individuals. You can opt out of Google Analytics with the Google Analytics opt-out browser add-on.

3. Advertising (Google AdSense)

We display ads served by Google AdSense. Google and its partners may use advertising cookies (including the DoubleClick cookie) to show ads based on your visits to this and other websites. You can manage ad personalization at Google Ads Settings and learn about or opt out of third-party vendor cookies at aboutads.info/choices. Where required by law, ads are served on a non-personalized basis unless consent is given.

4. Cookies

We set no first-party tracking cookies of our own. Cookies present on this site come from the Google services above. You can block or delete cookies in your browser settings; the calculators work fully without them.

5. Server logs and hosting

The site is hosted on Vercel, which — like any web host — maintains short-lived technical logs (IP address, request URL, user agent) for security and reliability. These are governed by Vercel's privacy policy.

6. Your rights (GDPR / CCPA and similar laws)

Because we hold no personal data about you ourselves, most data-rights requests (access, deletion, portability) apply to the third-party services above, and their links let you exercise those rights directly. If you believe we hold any personal data about you, contact us via the Contact page and we will respond within 30 days. We do not sell personal information.

7. Children's privacy

Our calculators are general-audience tools. We do not knowingly collect personal information from children under 13; since calculator inputs never leave the browser, none is collected through normal use.

8. Changes to this policy

We will update this page when our practices change and revise the "Last updated" date above. Significant changes will be noted on this page.

9. Contact

Questions about this policy? Reach us through the Contact page.