Privacy Policy
Last updated January 2026.
The short version
The calculator values you enter are processed in your browser. We do not use those values to create an account, sell a profile, or send your calculations to us.
Information you choose to send
If you contact us, we receive the name, email address, and message you submit. We use that information to respond, investigate an issue, or consider a suggestion.
Analytics and cookies
We may use privacy-respecting, aggregate analytics to understand which pages are useful and where the site needs improvement. Essential cookies or browser storage may be used for basic site features, such as remembering a display preference.
Third parties
We do not sell or rent personal information. Hosting, analytics, form, or other service providers may process limited information needed to operate the site, subject to their own policies.
Retention and security
We keep contact messages only as long as reasonably needed for support, records, or legal obligations. No online service can promise perfect security, but we take reasonable steps to protect information we handle.
Your choices
You can browse the calculators without creating an account. You can also disable non-essential cookies in your browser. To ask about a contact message or privacy question, use the contact page.
Changes
We may update this policy as the site changes. The date at the top of this page shows when it was last revised.