Privacy policy

Last updated November 15, 2026.

What you type into the calculator

The numbers you enter stay in your browser. The calculation runs on your device and nothing you type is sent to us or stored on a server.

Advertising

This site may show ads served by Google AdSense. Google and its partners use cookies to serve ads based on your earlier visits to this and other websites. You can turn off personalized advertising in Google's Ads Settings, and you can opt out of many other vendors' cookies at aboutads.info.

Analytics

We use Google Analytics to count visits and see which pages are used. It sets cookies and collects data such as your approximate location, device type and the pages you view. It does not receive the numbers you type into the calculator. Google explains how it uses this data, and how to opt out, at policies.google.com.

Server logs

Like most websites, our hosting provider records basic request data such as IP address, browser type and the page requested. We use it to keep the site running and to see which pages are used.

Children

The site is intended for adults and does not knowingly collect information from children under 13.

Contact

Questions about this policy can be sent to info@jantrah.com.