Privacy
There are no cookies and no accounts here, and what you type into the calculator stays in your browser.
What this site keeps on you
| Cookies | None |
|---|---|
| Accounts | None |
| Numbers sent by the page | None |
| Analytics | Cloudflare Web Analytics, cookieless |
What you type
The sums run on your own device, and the page doesn't send your numbers to us or anyone else.
So that you can bookmark a result, the page copies your numbers into its own web address. If you reload that address, open a saved link or share one, the numbers travel inside it, the way any web address does: to Cloudflare, which hosts the site, and to anyone you send the link to.
When you follow a link from here to another site, such as Etsy or Gumroad, this site tells your browser to send only its domain name, without your numbers.
Analytics
The site uses Cloudflare Web Analytics to count visits and see how fast pages load. It is cookieless, so it sets no cookies. Cloudflare's documentation says it doesn't log the part of the address that holds your numbers.
Buying the spreadsheet
The $9 spreadsheet is sold on Gumroad. If you buy it, you do that on their site, under their privacy policy.
Questions
Write to [email protected]. This page was last changed on 2026-11-03.