Privacy policy
Effective date: September 1, 2026
Last reviewed: September 24, 2026
Numerandi is operated by Numerandi / Chris Mitchell. This policy explains how this website handles information when you use its calculators and pages.
Your calculator entries stay on your device
Numerandi calculators run entirely in your browser. Values you enter—including income, expenses, filing status, and other financial information—are processed on your device and are not sent to Numerandi. Numerandi does not collect, store, or sell user-entered financial data.
The site has no accounts, database, server-side calculator functions, or contact forms. The hosting provider may process basic request data needed to deliver and secure the site, such as an IP address, browser information, the requested page, and the request time.
Analytics
Numerandi does not run its own analytics product or first-party analytics cookies. We do not build visitor profiles from calculator entries. Advertising measurement by Google is described in Advertising below.
Advertising
Numerandi uses Google AdSense under publisher ID ca-pub-2846907547088343. Every page loads Google's official AdSense script so the site can be reviewed and so ads may appear. Calculator pages request ads only after the complete result and, on wide screens, in a side rail. Numerandi does not place ads in calculator inputs, actions, or the primary result.
Ads may appear. Google and other advertising vendors may use cookies, web beacons, IP addresses, or other identifiers to serve and measure ads, including ads based on visits to this site and other sites. Google's use of advertising cookies enables Google and its partners to serve personalized ads. ReadGoogle's advertising privacy informationandGoogle's partner-sites policyfor how Google uses information on sites that use its services.
You can opt out of personalized advertising from Google inGoogle's Ads Settings. You can also visit theDigital Advertising Alliance opt-out page to opt out of some other third-party vendors' use of cookies for personalized advertising. Opting out of personalized advertising does not necessarily remove all ads or all cookies.
Consent choices for European visitors
A Google-certified consent management platform has not been installed yet. Personalized ads for visitors in the European Economic Area, the United Kingdom, or Switzerland still need that follow-up before they are a supported offering. The AdSense account script can still run for site review. When a CMP is added, it will provide the required disclosures and choices, retain consent records, and provide a way to change or revoke a choice.
External links and changes
Numerandi may link to other websites. Their privacy practices are governed by their own policies. This policy may change as the site adds features or legal requirements change. The effective date above will be revised when material updates are published.