Privacy

The numbers you type in the calculators stay in this browser. They are saved on your device so the page can reopen them. They are not sent to an account.

Visits are counted with Google Analytics. Google receives the page you open, and a general location such as the country. The numbers you type into a calculator are not part of that count. You can opt out with a browser add-on from Google Analytics Opt-out.

The calculators and the game do not load an advertising script. If a written guide later shows an ad, it will sit under the article, and Google may use cookies to measure it. You can change ad personalization in Google ad settings. How Google uses data from sites that use its services is explained in Google’s partner sites policy.