Privacy

Your calculator inputs stay in your browser. Calculations run on your device. The values you enter are added to the page address so you can share or bookmark a result, but they are not sent to or stored by us.

We don't require accounts and we don't sell personal information.

Like any website, our hosting provider processes standard technical information (such as IP addresses) to deliver pages and protect against abuse.

Analytics. We use Google Analytics to count visits and see which calculators are used. It sets cookies and collects standard usage data such as the page visited, referring site, device type and approximate location. We send Google the page address without the part that holds your calculator inputs, so the numbers you enter are not shared. You can block it with any content blocker or with Google's opt-out browser add-on at tools.google.com/dlpage/gaoptout.

If we add advertising in future, this page will be updated first to explain what is collected and how to opt out.