Last updated: October 24, 2026
The short version
- Numbers you type into our calculators never leave your browser. All calculations run locally on your device; nothing is sent to our servers.
- We do not sell personal data. We do not run accounts, so there is nothing to leak from a user database.
- If you contact us through the form, we receive your name, email, and message — used only to reply.
Calculator data
Our calculators are client-side tools: the JavaScript in your browser performs every computation. We do not transmit, log, or store the balances, rates, or payments you enter. If you are ever unsure, you can use every calculator with your network disconnected after the page loads.
Contact form data
When you submit the Contact form, we receive your name, email address, subject, and message by email. We use this only to respond to your inquiry. We do not add you to a mailing list (we don’t operate one) and we do not share contact submissions with third parties except our email/hosting providers as needed to deliver the message.
Cookies and analytics
WordPress may set strictly-necessary cookies for site operation (for example, to remember cookie-consent choices). If we enable privacy-respecting analytics in the future, this policy will be updated to describe exactly what is measured. We do not set cross-site tracking cookies ourselves. However, Google’s DoubleClick cookie may track your visits across sites to serve personalized ads.
Advertising
We display ads. Google is a third-party vendor on this site. Google uses cookies to serve ads, including the DoubleClick cookie, which enables Google and its partners to serve ads based on your visits to this site and other sites on the internet. You may opt out of personalized advertising by visiting Google’s Ads Settings.
Data retention and your rights
Contact-form emails are retained only as long as needed to handle your inquiry. You may request a copy or deletion of any personal data you have sent us via the Contact page.
Changes to this policy
Material changes will be noted here with a new “Last updated” date.