Privacy Policy
The honest summary: your numbers never leave your device, because there's nowhere for them to go.
What happens to what you type
Every calculation on this site runs inside your own browser using JavaScript delivered with the page. Nothing you enter is transmitted, stored on a server, or seen by anyone. Close the tab and it's gone.
What the site collects
The site itself collects no names, no email addresses and no personal data. There are no accounts, no sign-ups and no advertising trackers, and the site's own code sets no cookies. The one third-party service in use is covered in the next section.
Analytics
The site uses Google Analytics to understand aggregate visitor traffic, such as which calculators get used and how often. Google Analytics sets cookies and processes usage data according to Google's own privacy policy. The numbers you type never enter that measurement, and the site itself does not collect names, emails or accounts.
Local storage
One preference is saved in your browser's localStorage: your light-or-dark theme choice, if you use the toggle. It stays on your device and you can clear it any time through your browser settings.
Server logs
Like nearly every website, the hosting provider that serves these pages may keep standard server logs (IP address, page requested, time). Those logs belong to the host's infrastructure and are governed by the host's own policies.
If ads ever appear
Should third-party ads be added someday, the ad provider would come with its own privacy policy, and this page would be updated to say so plainly.
Related pages
The rules of the road for using the calculators live in the terms of use.