Privacy Policy

All calculations run entirely in your browser. The numbers you type into a calculator are never transmitted to or stored on our servers. We have no accounts and collect no personal information unless you email us directly.

Information we collect

Usage analytics. We use Google Analytics 4 to understand aggregate usage: pages viewed, approximate region derived from IP address, and device/browser type. We do not link this data to your personal identity. You can opt out of Google Analytics on any site by installing the Google Analytics Opt-out Browser Add-on.

Email correspondence. If you contact us at [email protected], we receive your email address and message contents, and use them only to respond to you.

Advertising

This site is supported by 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 (such as the DoubleClick cookie) enables it and its partners to serve ads to you based on your visit to this site and/or other sites on the internet. We have no access to or control over these third-party cookies.

You may opt out of personalized advertising at any time in Google Ads Settings. You can also opt out of many third-party vendors’ cookies for personalized advertising at aboutads.info/choices (US), optout.networkadvertising.org (US), or youronlinechoices.eu (EEA/UK). For details on how Google collects and uses data, see How Google uses information from sites or apps that use our services.

Cookies

We and our partners use cookies in three categories:

• Strictly necessary — required for the site to function (for example, remembering your preferences).
• Analytics — Google Analytics cookies (such as _ga) that measure aggregate usage.
• Advertising — cookies set by Google AdSense and its partners to serve and measure ads.

Where the law requires consent for non-essential cookies (as in the EEA and UK), analytics and advertising cookies stay off unless and until you have given consent. Elsewhere, by continuing to use NumExact, you consent to our use of cookies as described above. You can block or delete cookies at any time through your browser settings; the calculators will continue to work, since they run locally without cookies.

Your rights (EEA and UK — GDPR)

Where the GDPR applies, we process data on the basis of our legitimate interest in understanding aggregate site usage (analytics) and, where required, your consent (advertising cookies). You have the right to access, rectify, or erase your personal data; to restrict or object to processing; to data portability; and to withdraw consent at any time (via the opt-out links above or your browser settings) without affecting the lawfulness of prior processing. You also have the right to lodge a complaint with your local data protection authority. To exercise any of these rights, email us at [email protected].

Your rights (California — CCPA/CPRA)

California residents have the right to know what personal information we collect, to request its deletion or correction, to opt out of its sale or sharing, and to not be discriminated against for exercising these rights. We do not sell personal information for money. Disclosures of identifiers to advertising partners through cookies may be considered “sharing” under the CPRA; you can opt out via the advertising opt-out links above. To exercise any right, email us at [email protected].

Data retention and security

Because calculations never reach our servers, we retain none of the data you enter. Aggregate analytics are retained according to Google’s standard retention settings, and emails are kept only as long as needed to handle your request.

Children’s privacy

NumExact is not directed at children under 13, and we do not knowingly collect personal information from children. If you believe a child has provided us personal information, contact us and we will delete it.

International visitors

Our analytics and advertising providers (Google) may process information on servers in the United States and other countries whose data protection laws may differ from those where you live. By using the site you consent to such transfers.

Changes to this policy

We may update this policy from time to time by posting a revised version on this page with an updated date below. Your continued use of the site after changes take effect constitutes acceptance of the revised policy.

Contact

Questions about this policy: [email protected].

Last updated: 2026-09-29