Last updated: July 2026
What we collect. The calculators on this site run entirely in your browser. The numbers you type are never transmitted to us, stored on our servers, or shared — they exist only on your device while the page is open.
Advertising and cookies. This site is supported by advertising. Third-party vendors, including Google, use cookies to serve ads based on your prior visits to this and other websites. Google's use of advertising cookies (such as the DoubleClick cookie) enables it and its partners to serve ads based on your visits to this site and other sites on the internet. You may opt out of personalized advertising by visiting Google Ads Settings, or opt out of many third-party vendors' cookies at www.aboutads.info.
Analytics. We may use privacy-respecting, aggregate analytics to understand which calculators are useful. This data does not personally identify you.
Consent. Visitors in regions requiring consent (such as the EEA and UK) will be shown a consent message before advertising cookies are set, as required by law and Google publisher policies.
Third-party links. External sites linked from these pages have their own privacy practices, which we don't control.
Children. This site is not directed at children under 13 and does not knowingly collect information from them.
Contact. Questions about this policy: see the contact page.