Privacy
The short version: we don't sell your data, and our calculators work without collecting anything about you.
Calculators
Everything you type into a calculator stays in your browser. We don't store or see your answers. Your inputs may appear in the page address so you can share or bookmark a result.
Analytics
We use Cloudflare Web Analytics to count visits. It doesn't use cookies and doesn't track you across other websites.
If we offer email updates and you sign up, we use your email address only to send what you asked for. You can unsubscribe at any time from any email.
Contact
For any privacy question, email Steven Stewart at hello@numwise.co.uk.
Last updated 20 October 2026.