Short version: we collect as little as possible. Here is exactly what happens on CalculUnits.
Calculations stay on your device
All conversions and calculations run locally in your browser. No values you enter are sent to our servers — there is nothing to intercept, store or leak.
Local storage
We store your theme preference and recent conversions in your browser's local storage. This data stays on your device and can be cleared anytime from your browser settings.
Advertising & cookies
This site displays ads served by third-party vendors, including Google, which may use cookies to serve ads based on prior visits. You can opt out of personalized advertising at Google Ads Settings. For visitors in the EEA/UK, a consent banner (CMP) governs these cookies.
Analytics
We use Google Analytics 4 with IP anonymization to understand aggregate traffic. No advertising or analytics data is ever sold.
Your rights (GDPR)
To request deletion of any data we hold, contact contact@calculunits.com — deletion requests are handled within 30 days.
Last updated: October 2026