Last updated 8 November 2026.
Calculator inputs
Everything you type into a calculator stays in your browser. The numbers are not sent to us or stored.
Analytics
We use Google Analytics to understand how many people visit, which pages they use and roughly where visitors come from. Google Analytics uses cookies and similar technologies and collects information such as your device type, browser, pages viewed and an approximate location derived from your IP address. Google processes this data under its own privacy policy. You can opt out with Google’s browser add-on for disabling Google Analytics, or by blocking cookies in your browser.
If you email us, we use your address and message only to reply, and we do not add you to any mailing list.
Advertising
The site does not show ads at the moment. If that changes, this policy will be updated to describe the ad partners and the choices you have.
Children
The site is a general-audience tool and is not directed at children under 13.
Changes
We will update this page if the way we handle data changes, and change the date at the top.
Contact
Questions about privacy: hello@dirtcalculators.com.