Privacy
The calculation runs in your browser. To make scenarios shareable, the values you enter are also stored in the page URL.
How calculator inputs are handled
Calculations happen in your browser. Your current inputs are included in the page address so the calculation survives a reload and can be shared. Check the address before sharing it.
Shareable URLs can contain sensitive values
A URL containing income, pay, balances, or other inputs can appear in browser history and is sent through normal web infrastructure when the page is opened or reloaded. Anyone you share that URL with can see those values. Check the address before copying or sharing it, and avoid sharing a scenario you consider sensitive.
Analytics
We use aggregate analytics to understand which calculator pages are useful. Calculator code does not intentionally add input values to analytics events. URL handling is subject to the warning above, so inputs should not be treated as secret merely because the math is local.
Feedback and favourites
Feedback and Contact messages are saved so we can review them and, when needed, reply to the email you provide. A calculator scenario is attached to feedback only when you select that option. Favourites stay in this browser and are not sent to us.
No account, no tracking profile
Calculate.FAST needs no sign-up. There is no account, no cross-site advertising profile, and no selling of data.