Privacy Policy

Last updated: August 26, 2026

This policy explains what information Factor Calculator collects when you use this website, how it is used, and what choices you have.

Calculator inputs are not collected

Every calculation on this site runs entirely in your browser. The numbers you type are never sent to a server, never logged, and never stored. Closing the tab removes them completely.

Information collected automatically

Like most websites, basic technical information may be recorded when you visit:

• Browser type and version
• Device type and screen size
• Approximate location (country or region level)
• Pages visited and time spent
• The site you arrived from

This information is aggregated and is not used to identify individual visitors.

Cookies

Cookies are small text files stored by your browser. This site may use them for:

• Analytics — understanding which pages are useful and where visitors have trouble
• Advertising — if advertising is enabled, ad partners may use cookies to show relevant ads

You can block or delete cookies through your browser settings. The calculators work normally with cookies disabled.

Analytics

This site may use Google Analytics to understand aggregate traffic patterns, such as which pages are visited and how long sessions last. Google Analytics does not receive the numbers you enter into any calculator.

Advertising

This site may display advertising served by Google AdSense or similar networks. Third-party vendors, including Google, use cookies to serve ads based on your prior visits to this and other websites.

How to opt out

You can limit analytics and personalized advertising using the following official tools:

• Google Analytics opt-out browser add-on — Stops Google Analytics from collecting your visit data.
• Google Ads Settings — Turn off personalized advertising from Google.
• aboutads.info — Digital Advertising Alliance — Opt out of third-party vendor advertising cookies.

Third-party links

Some pages link to external references such as Wikipedia, Wolfram MathWorld, and the OEIS. Those sites have their own privacy policies, and this policy does not cover them.

Children's privacy

This site is designed for general educational use and does not knowingly collect personal information from children under 13. No account, sign-up, or personal detail is required to use any calculator.

Your rights

Depending on where you live, you may have the right to access, correct, or delete personal information held about you, and to object to certain processing. Because this site does not collect personal information directly, most requests will relate to analytics or advertising cookies, which you can control through your browser and the opt-out links above.

Changes to this policy

This policy may be updated from time to time. Any changes will be posted here with a revised date at the top of the page.

Contact

Questions about this policy can be sent to contact@factorcalculator.org, or through the contact page.