Privacy policy
Last updated 16 September 2026.
The numbers you type into our calculators are processed in your browser. They are not sent to us. Some tools save your entries in your browser’s local storage so they are still there next time; you can clear them at any time by clearing site data.
Analytics and advertising
We use Google Analytics to count visits. If advertising is enabled, Google and its partners may use cookies to show ads based on your visits to this and other sites; you can opt out at Google Ad Settings. Where required, we ask for consent before setting non-essential cookies.