Privacy policy

Last updated October 31, 2026.

Calculator inputs

All calculations run locally in your browser; the numbers you enter are not sent to our servers. Your inputs appear in the page URL so you can share results, and your latest inputs and theme preference may be stored in your browser’s local storage. Clear your site data to remove them.

Advertising

We use Google AdSense. Google and its partners use cookies to serve ads based on your prior visits to this and other websites. You can opt out of personalized advertising at Google Ads Settings or aboutads.info. See how Google uses information from sites that use its services.

Analytics

We use Google Analytics to see which pages are used. These tools collect standard information like pages viewed, device type and approximate location — never your calculator inputs.

Your rights

Residents of California and other states with privacy laws may request information about data collected by our advertising and analytics partners and opt out of the sale or sharing of personal information using the consent tools shown on the site or the links above.

Children

This site is not directed to children under 13.

Contact

Use our contact page.