Privacy Policy.
Last updated: July 2026
VPD Calculator (“we,” “us,” the “Site”) is a free vapor pressure deficit calculator and chart at vpd-calculator.com. We keep data collection to the minimum needed to run and improve a simple web tool. This policy explains what is collected and why.
Information we collect
- No account, no personal input. The calculator works client-side. The temperature, humidity, and settings you enter stay in your browser and are never sent to us.
- Analytics. We use Google Analytics to understand aggregate, anonymous usage (pages viewed, device type, approximate region). This may set cookies and process a truncated IP address.
- Server & security logs. Our host and Cloudflare keep standard request logs (IP, browser, timestamp) for security and abuse prevention.
Cookies
Cookies are small files a site stores in your browser. We use them only for analytics and, where applicable, affiliate-link attribution (see our Terms & Affiliate Disclosure). You can block or delete cookies in your browser settings; the calculator still works without them.
Third parties
We rely on a few reputable services that have their own privacy policies: Google Analytics (analytics), Cloudflare (security & delivery), and affiliate networks such as Amazon Associates and grow-equipment brands for outbound product links.
Your choices
- Use browser controls or a “Do Not Track” / ad-blocking extension to limit analytics.
- Clear cookies at any time.
- Contact us to ask what, if anything, is associated with your visit.
Children
The Site is a general-audience gardening tool and is not directed to children under 13. We do not knowingly collect data from children.
Changes
We may update this policy as the Site evolves. Material changes will be reflected in the “Last updated” date above.
Contact
If you have questions about this policy, please reach out and we will respond as soon as we can.