Privacy policy
Last updated: 2 November 2026
What the calculators collect
Calculations run in your browser. The measurements you enter are not sent to us or stored.
Cookies and storage
We store one small setting in your browser if you dismiss the country suggestion. We don't currently use analytics or advertising cookies. The site is delivered through Cloudflare, which processes technical data such as IP addresses to serve and protect the site, and handles email sent to [email protected] so it reaches us. We will update this policy before adding analytics or advertising.