Stitch Math is a static website. It has no accounts, no comment system and no saved history. The calculators run entirely in your browser; the numbers you type are not sent to a server.
What is collected
Like most websites, the hosting and CDN provider records standard request logs when a page is loaded. These logs may include your IP address, the page requested, the referring page, the time of the request and your browser's user agent. They are used to operate the site, diagnose errors and protect against abuse.
Cookies
The site itself does not set cookies for analytics or profiling. The hosting and CDN provider may set a short-lived security cookie to distinguish browsers from bots and to protect the service. You can block or delete cookies in your browser settings; the calculators will continue to work.
If you email the address on the contact page, your message and address are used to reply and, where relevant, to correct the site. They are not added to a mailing list or sold.
Third-party links
Links to manufacturers, standards bodies and other external sites are provided for reference. Once you follow an external link, that site's own privacy policy applies. This site does not control what those sites collect.
Children
The site is a general reference and is not directed at children. It does not knowingly collect personal information from anyone, including children.
Your choices
You can browse with cookies disabled and with tracking protection enabled; the calculators will continue to work. To ask a question about the handling of a message you have sent, use the contact page.
Changes
If the site begins to use a new analytics or hosting service, this page will be updated before the change takes effect. The date below records the last substantive change.
Last updated 23 October 2026.