— Privacy Policy
Last updated: August 27, 2026. This page explains what information this site collects, how it's used, and the choices available to you. No account, login, or registration of any kind is required to use this site.
Calculator History
Each calculator keeps a history of your last 25 calculations using your browser's local storage (localStorage). This data stays on your device only — it is never sent to this site's server or to any third party. It persists until you clear it (via each calculator's "Clear history" button) or clear your browser's site data, and it doesn't carry over to a different browser or device.
Contact Form
The Contact page's form is processed by a third-party form-relay service (Web3Forms), which delivers your name, email, and message directly to this site's email address — this site's own infrastructure never stores or sees the submission. See Web3Forms' privacy policy for how they handle that data in transit.
Cookies & Advertising
This site may display ads served by Google. Google and its partners use cookies (including the DoubleClick/Google Ads cookie) to serve ads based on your prior visits to this and other websites. You can opt out of personalized advertising by visiting Google Ads Settings, or opt out of a participating vendor's use of cookies for personalized advertising at aboutads.info/choices. See how Google uses information from sites that use its services for more detail.
Server Logs
Like most web servers, the infrastructure hosting this site may automatically log standard technical information for security and operational purposes — IP address, browser/device type, pages visited, and timestamps. This is not linked to any other information you provide on the site.
Children's Privacy
This site is a general engineering reference and isn't directed at children under 13. It doesn't knowingly collect personal information from children.
Changes to This Policy
This policy may be updated from time to time (for example, if advertising or analytics services change). The "Last updated" date at the top of this page reflects the most recent revision.
Contact
Questions about this policy can be sent via the Contact page.