Last updated: October 17, 2026
The short version: these calculators run entirely in your web browser. We do not have accounts, we do not ask for your name or email to use a calculator, and the sizes and prices you type in are never sent to us or stored anywhere.
What we collect: nothing about you personally. Like most websites, our hosting provider (Cloudflare) may keep standard technical logs (such as pages visited and approximate location at country level) to keep the site running and measure visits. We do not sell personal information — we do not collect any to sell.
Cookies and advertising: this site may display advertising in the future (for example through Google AdSense). If ads are shown, advertising partners including Google may use cookies to serve ads based on your visits to this and other websites. You can opt out of personalised advertising at Google's Ad Settings (adssettings.google.com) and learn more at policies.google.com/technologies/ads.
Contact: if you email us, we will only use your email address to reply. See the contact page.