Privacy Policy — CalcsHub

Last updated: August 2026

1. Introduction

Welcome to CalcsHub.online ("we", "our", or "us"). We respect your privacy and are committed to protecting your personal data. This Privacy Policy explains how we collect, use, disclose, and safeguard information when you visit our website and use our 164 free calculator tools.

2. Information We Collect

We do not require user registration, accounts, or logins to access any calculator on this site, and the numbers you type into a calculator (your weight, income, age, etc.) are processed directly in your browser — we do not collect or store your calculator inputs or results on our servers. We may automatically collect limited, non-personally-identifiable technical information when you visit, including:

  • Browser type and version, operating system, and device type
  • Referring URL (the page or search engine that sent you to us)
  • Pages viewed, time spent on pages, and general usage patterns
  • Approximate location (country/region level, derived from IP address)

If you contact us through our Contact page, we collect the name, email address, and message you voluntarily provide, solely to respond to your inquiry.

3. How We Use Information

We use the information described above to operate and improve the site, understand which calculators are most useful, diagnose technical issues, serve relevant advertising, and respond to messages you send us. We do not sell your personal information to third parties.

4. Cookies & Tracking Technologies

Like most websites, we use cookies and similar technologies (such as local storage) to remember your cookie-consent choice, understand aggregate site usage, and support the advertising described below. You can control or delete cookies through your browser settings at any time; note that blocking cookies may affect how ads and some site features display.

5. Google AdSense & Advertising

We use, or intend to use, third-party advertising vendors, including Google AdSense, to serve ads on our website. Google and its partners use cookies (such as the DoubleClick DART cookie) and similar technologies to serve ads based on your prior visits to this website and other websites on the Internet, in order to provide advertisements about goods and services that may interest you.

  • You may opt out of personalized advertising by visiting Google Ad Settings.
  • You can also opt out of a number of third-party vendors' use of cookies for personalized advertising by visiting www.aboutads.info (US) or youronlinechoices.eu (EU).
  • Third-party vendors and ad networks may also serve ads on our site in compliance with Google AdSense program policies.

6. Analytics

We may use analytics services (such as Google Analytics) to understand how visitors use our site in aggregate. These services may use cookies and similar technologies to collect and analyze usage information; any data collected is used in aggregate and is not used to individually identify you.

7. Children's Privacy

CalcsHub is a general-audience website intended for adults, including our Baby & Parenting calculators, which are designed for parents and caregivers — not children. Our site is not directed at children under 13, and we do not knowingly collect personal information from children under 13. If you believe a child has provided us with personal information, please contact us so we can remove it.

8. GDPR Privacy Rights (EEA & UK Users)

If you are located in the European Economic Area or the United Kingdom, you have the right to request access to, correction of, deletion of, or restriction on the processing of your personal data, the right to data portability, the right to object to processing, and the right to lodge a complaint with your local data protection authority. Because we do not require accounts and do not store personally identifiable profiles on our servers, there is typically no personal data associated with your calculator use for us to provide or delete; requests related to cookies or contact-form submissions can be sent to the email below.

9. CCPA/CPRA Privacy Rights (California Users)

If you are a California resident, you have the right to know what personal information is collected about you, to request deletion of personal information, and to opt out of the "sale" or "sharing" of personal information (which can include certain advertising cookies) under the CCPA/CPRA. You can exercise your opt-out choice using the Google Ad Settings and industry opt-out links in Section 5, or by contacting us directly.

10. Data Retention & Security

We retain automatically collected technical/usage data only as long as necessary for the purposes described in this policy, and contact-form messages only as long as needed to respond to and resolve your inquiry. We use reasonable technical and organizational measures to protect information we do hold, but no method of transmission or storage over the Internet is 100% secure.

11. Third-Party Links

Our site may link to external websites, including official government sources and reference material. This Privacy Policy does not apply to, and we are not responsible for, the privacy practices of any third-party site.

12. Changes to This Policy

We may update this Privacy Policy from time to time to reflect changes in our practices or for legal/regulatory reasons. The "Last updated" date at the top of this page reflects the most recent revision. We encourage you to review this page periodically.

13. Contact Us

If you have any questions about this Privacy Policy, please contact us at nakapunks1@gmail.com or via our Contact page.