Privacy policy
Last updated 27 October 2026.
Your marks and courses
Everything you type into the calculator is worked out in your own browser. It is saved in your browser's local storage on this device only, so your courses are still there when you come back. It is never sent to us, to analytics or to advertisers. Use "Clear" in the calculator, or clear this site's data in your browser, to remove it.
Analytics
We may use Google Analytics to count visits and see which pages are useful. It sets cookies to tell visits apart and receives the page address without anything you type; Google signals and ad personalisation through analytics are switched off.
Advertising
This site shows advertisements from Google AdSense. Google and its partners use cookies to show ads based on your visits to this and other websites. You can turn off personalised ads in Google's ad settings. Ads never receive your marks or anything you type.
Fonts and other services
Fonts and the calculator's scripts are served from this site itself; no third-party fonts or social-media embeds are loaded. The Google Analytics and Google AdSense scripts described above come from Google.
Contact
Privacy questions: whisperperks@gmail.com.