Short version: there is not much to collect. Every calculator runs in your browser, and nothing you type gets sent to a server.
Medical bills, wages, ages, whatever you enter into a calculator, that math happens locally in JavaScript. Close the tab and it is gone. We have no database of user entered figures because we never built one.
Aggregate traffic is measured through standard analytics cookies so we can see which pages get used and which do not. That data is reported in bulk and is not tied back to any calculation you ran.
Google AdSense serves the ads on this site and may set its own cookies to choose which ad to show. Google's own policies, not ours, govern how that data gets used. You can manage ad personalization from your Google account settings.
A few links on this site point to related calculator tools and, occasionally, to paid services. Some of those are affiliate links, meaning we may earn a small commission if you click through, at no extra cost to you.
If this policy changes, the date at the top updates. We do not send notices for minor wording changes.