THE SHORT VERSION / YOUR NUMBERS STAY HERE
Curious about the math.
Not your personal data.
This site does not need an account, an address, or your order history.
Calculator inputs
Calculations run in your browser. There is no form submission, advertising tracker or analytics script in this site’s code. Copying a scenario creates a link containing its numbers. Share that link only if you want others to see those values.
Hosting and external links
The web host may keep standard request logs, such as IP addresses and requested URLs, to operate and secure the site. Links to delivery services take you to third-party sites with their own privacy practices.
Storage
The site does not use tracking cookies or store calculator history. A shared calculator URL can contain its scenario parameters. Your browser may keep visited pages in its own history.
Last updated October 30, 2026.