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.
What data we collect
We do not collect personal information through forms or accounts. The only data we receive is standard server log data (IP address, browser type, pages visited, referrer URL) that your browser sends automatically with every request. This data is retained for up to 30 days for security and debugging purposes and is not sold or shared with third parties.
Cookies
We use essential cookies to remember your theme preference (light or dark mode). Google Analytics sets additional cookies to count visits and measure site performance. No advertising cookies are set unless you have explicitly consented. You can block or delete cookies at any time through your browser settings; the calculators will continue to work without them.
Third-party links
Some pages link to external sources such as government websites, marketplace fee pages, or reference materials. We are not responsible for the privacy practices or content of those sites. We recommend reading their privacy policies before submitting any personal information to them.
Your rights
If you are in the European Economic Area, UK, or California, you have rights regarding your personal data, including the right to access, correct, or delete any information we hold about you. Because we collect no personal data beyond anonymous analytics, there is in practice nothing to access or delete. If you have questions, email us at the address below.
Children
This site is not directed at children under 13. We do not knowingly collect personal information from children. If you believe a child has provided us with personal information, please contact us and we will delete it.
Changes to this policy
We may update this policy from time to time. The date at the top of the page reflects the most recent revision. Continued use of the site after a change constitutes acceptance of the updated policy.