Privacy Policy

Last updated: November 6, 2026

Calculator inputs

Everything you enter into a calculator is processed in your browser. We do not send those values to our servers or store them.

Analytics

We use analytics to understand which pages are visited and how the site performs. This collects information such as pages viewed, referring site, browser type and approximate location derived from your IP address. We use it only in aggregate to improve the site.

Advertising and cookies

This site shows ads served by Google and its partners. 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 enables it and its partners to serve ads to you based on your visits to this and other sites on the internet.

You can opt out of personalized advertising by visiting Google Ads Settings, or opt out of some third-party vendors' use of cookies at aboutads.info. Learn more about how Google uses data from sites that use its services.

Visitors in the European Economic Area, the UK and Switzerland are asked for consent before personalized ads or non-essential cookies are used, and can change that choice at any time.

Emails you send us

If you email us, we use your address and message only to reply. We don’t add you to a mailing list or share your email with anyone.

Your privacy rights in the US

Residents of California and some other US states have rights over their personal information, including the right to know what is collected, to ask for it to be deleted, and to opt out of its “sale” or “sharing” for targeted advertising. We don’t sell personal information for money, but advertising cookies may count as “sharing” under some state laws. Where required, a privacy choices message on this site lets you opt out. You can also email us to make a request.

Your choices

You can block or delete cookies in your browser settings. The calculators work without cookies.

Children

This site is not directed at children under 13, and we do not knowingly collect their information.

Changes and contact

We may update this policy and will change the date above when we do. Questions: hello@housemath.org.