Privacy policy
Last updated: September 7, 2026.
1. Your calculations never leave your device
Every measurement you enter is processed locally in your browser using JavaScript. Nothing is transmitted to us, stored on a server, or retained after you close the page.
2. What we do collect
We do not have accounts, contact forms or newsletters. As of the date above this site sets no cookies at all, uses no analytics and loads no third-party scripts. The only data that leaves your browser is the request your browser makes to our hosting provider, which logs it for security and delivery.
3. We do not sell or share your personal information
We have never sold, shared or otherwise disclosed personal information for money or for cross-context behavioral advertising, and we do not do so today. We do not knowingly collect information from children under 13.
4. Advertising and cookies
This site does not currently display advertising. If we activate third-party advertising in the future (we expect to use Google AdSense), advertising partners may use cookies or similar identifiers to serve and measure ads. Before that happens we will update this page with a new date, and visitors from regions that require prior consent will see a consent notice before any non-essential cookie is set.
5. Your privacy choices
You can block or delete cookies in your browser settings at any time. Residents of California, Virginia, Colorado, Connecticut and other states with comprehensive privacy laws have the right to know what personal information is held about them, to have it deleted, and to opt out of its sale or sharing. Because we hold none, there is nothing to disclose, delete or opt out of — but you can exercise any of those rights by writing to the address below and we will answer within 45 days.