Privacy Policy
What information Checked Math processes when you use a calculator, how advertising cookies from Google work, and how to opt out.
Calculator inputs
You do not need an account to use any calculator. The numbers you type stay in the page in your browser, are calculated there, and are not sent to a server, saved to browser storage or written to a database by this site.
The hosting service that delivers the site may process standard request information such as IP address, browser user agent, requested page, time and security-related data in order to deliver and protect the service.
Advertising and cookies from Google
Checked Math is supported by advertising served by Google AdSense. Ads are shown only beside or between explanatory content, never inside a calculator, and they never receive the numbers you type.
Third-party vendors, including Google, use cookies to serve ads based on a visitor’s 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 site and other sites on the Internet.
You can opt out of personalised advertising by visiting Google’s Ads Settings (adssettings.google.com), and learn how Google uses information from sites that use its services at policies.google.com/technologies/partner-sites. Visitors in the European Economic Area, the United Kingdom and Switzerland are asked for their consent through a Google-certified consent message before personalised ads are used.
The site does not run its own analytics or tracking scripts.
Keeping personal information out
- Do not enter passwords, account numbers or other secrets into calculator fields — no calculator needs them.
- Calculators only ask for numbers and units; there are no free-text fields for personal details.
Changes to this policy
A material change to how information is processed is described on this page and the “Last updated” date above changes with it.