Privacy
Last updated 2026-10-18. This site is run by Tithesis LLC, Raleigh, North Carolina. Contact: contact@tithesis.com.
What you enter. The site does not send the values you enter to Tithesis LLC or to anyone else. There are no accounts, no sign-in and no forms. Calculations run in your browser.
Saved work. Sheets keep your work in this browser's local storage, under names beginning "tithesis.", so it is there when you return. It stays in this browser profile on this device. It is not synced or backed up, and we cannot see or recover it. If a saved sheet cannot be read, the unreadable copy is kept beside it so nothing is silently lost. Anyone using the same browser profile can see and change saved work. Delete saved data removes the work saved by the tools on this site, including any unreadable copies. Other data this site may have stored in your browser earlier is not removed by this button; you can remove all of it by clearing this site's data in your browser settings.
Copy and print. Copy and print are handled by your browser when you click them. A copied or printed result leaves this site and is then under your control.
No cookies, analytics or tracking of our own. The site sets no cookies of its own. It uses no analytics, advertising or tracking tools. Fonts, scripts and images load only from this site. Our hosting provider may set technical cookies that are needed to deliver the site. Links to outside references, such as the NIST/SEMATECH e-Handbook, take you to those sites, and their own policies apply.
Server logs. When your browser requests a page, our hosting provider (Bluehost) and any network services it uses may process and keep standard server access logs: IP address, page requested, date and time, browser and device information, and referrer. These are used to deliver the site, keep it secure and fix problems. Access logs are kept according to the hosting provider's standard practice. We do not use them to build profiles, and we do not sell or share them for advertising.
Email. If you email us, we receive what you send and use it to reply. Do not send confidential production, customer or personal data.
Your choices. You control the data in your browser and can delete it at any time. For emails or server logs we hold, write to contact@tithesis.com. Depending on where you live, you may have rights to access, correct or delete that information.
Children. This site is not intended for children under 13.
Changes. When the site's data handling changes, we update this notice and the date above.
Saved copy. After a visit, this browser keeps a copy of the pages and scripts so the tools can open with no signal. A bar says New version ready, reload when a newer copy is waiting; nothing switches until you click it.