The short version
- The calculators run in your browser. What you type into them is not sent to us.
- Your unit and theme choices are saved in your own browser so the site remembers them.
- The site may show ads from Google, which uses cookies. You can control ad personalization, as explained below.
Information you enter into calculators
All calculations happen on your device. We do not receive or store the numbers you enter. If you use the Copy link button, your inputs are placed in the web address so the result can be reopened. Anyone you share that link with can see those inputs.
Browser storage
We use your browser’s local storage to remember preferences such as kilometers or miles, kilograms or pounds, and light or dark theme. This information stays on your device, is not sent to us, and can be cleared in your browser settings at any time.
Advertising and cookies
We may use Google AdSense to show ads. Third-party vendors, including Google, use cookies to serve ads based on your prior visits to this website or other websites. Google’s use of advertising cookies enables it and its partners to serve ads to you based on your visits to this site and other sites on the internet.
You can opt out of personalized advertising by visiting Google My Ad Center. You can also opt out of some third-party vendors’ use of cookies for personalized advertising at www.aboutads.info. To learn more, see how Google uses information from sites that use its services.
Visitors in the European Economic Area, the United Kingdom and Switzerland are asked for consent before personalized ads are shown, through a consent message provided by Google.
Analytics and hosting
The site is hosted by Cloudflare, which processes technical data such as IP addresses to deliver pages and protect the site from abuse. We may use Cloudflare Web Analytics, which counts visits without cookies and without tracking you across sites.
Children
This site is intended for a general audience and does not knowingly collect personal information from children.
Changes and contact
We will update this page if our practices change and revise the date at the top. Questions about privacy can be sent to [email protected].