Last updated: 2026-09-26
Summary
GravelMatter has no accounts and does not run its own analytics. Calculations run in your browser. The site uses Google AdSense to show advertising, and Google and its partners may use cookies and similar technologies for that purpose, as described below.
What is processed
- Calculator inputs are processed in your browser. To let you share or bookmark a calculation, they are written into the page address (the part after “?”). They are only sent to our web server if you load or share that address, when they appear in the request like any other web address.
- Server logs. Like most websites, our hosting provider may keep standard access logs (IP address, time, page requested, browser type) for security and operations. We don't use them to build profiles.
- Clipboard. The Copy buttons write to your clipboard only when you press them. We never read your clipboard.
- Email. If you email us, we use your message and address only to reply.
Advertising (Google AdSense)
GravelMatter uses Google AdSense, an advertising service provided by Google, to help fund the site. When you visit a page, your browser loads Google's advertising code, and Google decides whether and which ads to show.
- Google and other third-party vendors may use cookies to serve ads on GravelMatter.
- Third parties, including Google, may place and read cookies on your browser, or use web beacons, IP addresses or similar identifiers, to serve and measure ads.
- Google's use of advertising cookies enables it and its partners to serve ads to you based on your visits to GravelMatter and/or other sites on the internet.
- Depending on your settings, your consent where it is required, and Google's own systems, you may see personalised or non-personalised ads. Non-personalised ads may still use cookies or similar technologies, for example for frequency capping, aggregated ad reporting and fraud prevention.
You can manage or opt out of personalised advertising from Google in Google Ads Settings. To learn how Google uses information from sites that use its services, see How Google uses information from sites or apps that use our services.
Google processes this data under its own privacy policy; GravelMatter does not control Google's data processing and does not receive information that identifies you from these cookies. Advertising never changes how calculator results are worked out.
Cookies
GravelMatter itself does not set cookies. Cookies and similar identifiers on this site come from Google's advertising services described above. You can block or delete cookies in your browser settings; doing so may affect the ads you see but not how the calculators work.
Third parties
Apart from Google's advertising code, the site loads no third-party scripts, fonts or embeds. Links to external sources take you to sites with their own policies.
Changes
If we add analytics or change how advertising works, this page will be updated first, and any cookie consent required by law will be requested.