Privacy Policy

1. Our Main Rule: All Math Runs on Your Device

At CalculatorDilution.com, we treat your lab math as private. That means your reagent strengths, drug screen values and recipes.

All math, unit changes and serial dilution views run inside your web browser. The numbers you type, such as stock strength, volumes, dilution factors and sample counts, never leave your device. No server ever gets them or logs them.

2. Information We Collect

• Messages you send us: When you write to us by email or through the contact form, we get what you choose to share. That is your name, your email and your message. We use it only to reply to your note, question or bug report.
• Basic server logs: Our web host keeps basic tech logs on its own. These hold things like IP address, browser type, system type and the time of each request. They do not name you. They are used only to keep the site safe, block attacks and keep it running.

3. Cookies and Storage

We do not use tracking cookies, ad beacons or cookies that build a profile of you. We may one day save small settings on your device (for example with localStorage , to keep your last tab or unit). If we do, that data stays on your device. It is never sent to our servers.

4. Hosting and Fonts

To keep the site fast, safe and easy to read, we use common content networks (CDNs) and fonts from Google Fonts. Every link to the site is locked with HTTPS (TLS 1.3).

5. Analytics and Advertising

We show no ads. We do not sell user data. We do not track you on other sites. If we ever add basic, privacy-first site stats, we will update this policy right away.

6. Data Retention

We keep your messages only as long as we need to answer them. Then we delete them. Server logs are kept for a short time to fix faults and to check security.

7. Your Privacy Rights

Data laws such as the GDPR in Europe and the CCPA/CPRA in California give you rights over your data. You can ask to see, fix or delete any email you have sent us. To ask, use the privacy contact below. We reply within the time the law sets.

8. Children’s Privacy

This site is a science and math tool for the general public, students and researchers. We do not knowingly collect personal data from children under 13.

9. Privacy Questions

For questions or requests about this policy, use our Contact Page or write to privacy@calculatordilution.com.