Privacy policy
Last updated: July 2026
This policy explains what data this website collects, how it is used, and the choices you have.
Calculator inputs
The numbers you type into our calculators are processed entirely in your browser. They are never transmitted to our servers, stored, or shared. Closing the page discards them.
Analytics
We use Cloudflare Web Analytics, a privacy-first analytics service that does not use cookies, does not track you across sites, and does not collect personal information. It gives us aggregate counts — page views, referrers, country-level location, and browser type — so we can see which pages are useful. See Cloudflare's privacy documentation for details.
Advertising
This site is supported by advertising served by Google AdSense. Google and its partners may use cookies or similar technologies to serve ads based on your visits to this and other websites.
- Google's use of advertising cookies is described in Google's advertising policies.
- You can opt out of personalized advertising at Google Ads Settings.
- Users in the European Economic Area and other regions with consent requirements will be shown a consent message before personalized ads are served.
We do not run any other third-party trackers.
Server logs
Our hosting provider (Cloudflare Pages) may keep standard, short-lived server logs (IP address, user agent, requested URL) for security and abuse prevention. We do not access or combine these with any other data.
Data we do NOT collect
We do not require accounts. We do not collect names, email addresses (unless you email us), payment details, or precise location. We do not sell data to anyone.
If you contact us, we keep the correspondence for as long as needed to handle your request. We don't add you to any mailing list.
Children
This site is not directed at children under 13 and we do not knowingly collect information from them.
Changes
We will update this page when our practices change and adjust the date above. Significant changes will be noted on this page.
Contact
Questions about this policy: [email protected].