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Try the calculator

THE DETAILS

Privacy & independence

A calculation that stays with you.

Your calculations stay on your device

The calculator stores the numbers you enter and your chosen currency in this browser’s local storage so you can return to them. There is no account or calculator submission endpoint. We do not send your calculator inputs or results to Google Analytics. Clear this site’s browser data to remove saved inputs; Reset example replaces them with the example.

Optional visitor analytics

With your permission, we use Google Analytics to understand page visits and traffic sources. It uses cookies and processes browser and device information, approximate location and page visits. Google receives connection information such as your IP address when its service is loaded. We do not load analytics until you allow it, and advertising personalization is disabled. You can reject analytics or withdraw permission at any time using Analytics preferences in the footer; withdrawing removes our analytics cookies from this browser. Your choice is saved in local storage. Google privacy policy.

Hosting and external links

Our hosting provider may process routine connection information needed to serve pages. Following a link to an external source takes you to that provider’s site and its own privacy practices. The calculator does not request your address or location.

Independent information

This initial version contains no paid placements or affiliate tracking links. Estimates reflect your assumptions and do not guarantee savings or determine installation eligibility.