Privacy
The calculator runs entirely in your browser. The dates you enter are processed on your device and never transmitted to us.
Analytics
This site uses Google Analytics to count visits and see which pages are useful. It records the page you viewed, a rough location derived from your IP address (which is truncated before storage), and general device and browser details. It does not receive the values you type in — those stay in your browser. Google explains its part at policies.google.com/technologies/partner-sites.
Advertising
This site is funded by Google AdSense. Google and its partners may use cookies or device identifiers to serve and measure ads, including personalised ads where you have consented. Manage your choices at myadcenter.google.com and read how Google uses data from sites that use its services at policies.google.com/technologies/partner-sites.