Privacy policy
What we collect
We set no cookies and run no advertising trackers. We count anonymous events, such as a calculator being used or an Amazon button being clicked. Each event records the page, the kind of event, the device class, the general source of the visit and the country. It records no IP address and no identifier.
Calculators
The calculators run in your browser. What you enter is not sent to us.
Our hosting
Cloudflare hosts this site and may process technical request data, including IP addresses, to deliver pages and protect the service.
Fonts
Fonts load from Google Fonts, so Google receives your IP address when a page loads.
Amazon links
Following a link to Amazon takes you to Amazon, where Amazon's own privacy notice and cookies apply. Amazon can see that you came from an affiliate link.
If you email us, we keep your message to answer it and to record any correction.
Your choices
Since we hold no profile of you, there is nothing to access or delete beyond an email you sent us. Email us to have that removed. Residents of states with privacy laws, including California, may use the same address. We do not sell or share personal information.
Children
This site is not directed to children under 13.
Changes
We update this policy when our practices change.