Privacy Policy

1. Introduction

At Molecular Weight Calculator (https://molecularweightcalculator.net), we are committed to safeguarding the privacy of our visitors. This Privacy Policy explains what information is collected when you access our tools, how that information is used, and your rights under global data protection laws including the General Data Protection Regulation (GDPR) and the California Consumer Privacy Act (CCPA/CPRA).

2. Client-Side Formula Calculation Privacy

Our chemistry and life sciences calculators — including the Molecular Weight Calculator, Molar Mass Calculator, and DNA MW Calculator — operate entirely on client-side JavaScript within your browser.

• No Formula Logging: Chemical formulas, compound names, amino acid strings, and concentrations entered into our tools are processed in your local device RAM.
• No Data Transmission: Calculation parameters are never sent to our web servers or shared with any third party.

3. Information We Collect

We operate under strict data minimization principles and collect only the minimum information necessary to operate and secure our website:

A. Information You Provide Directly

If you contact us via our Contact Form or direct email, we receive the name, email address, and message content you provide. We use this information solely to reply to your inquiry.

B. Automatically Collected Technical Data

Like standard web servers, our hosting infrastructure may temporarily record non-personally identifiable server log data. This includes IP address, browser user-agent, operating system, referring URLs, and access timestamps to protect against malicious traffic, prevent DDoS attacks, and verify server uptime.

4. Cookies, Local Storage & Web Technologies

We use browser local storage and essential cookies to maintain site functionality. For full technical details and browser-specific management guides, please consult our dedicated Cookies Policy.

• Functional Storage: We use HTML5 LocalStorage (e.g., cookie-consent) to remember your cookie preference so the consent banner does not appear repeatedly.
• Session Caching: Standard IUPAC atomic mass tables are cached in browser memory during your session for instantaneous computation speed.

5. Google AdSense & Third-Party Advertising Disclosures

To support our free scientific tools, we may display advertisements provided by Google AdSense and third-party advertising partners.

• Google, as a third-party vendor, uses cookies to serve ads on Molecular Weight Calculator.
• Google's use of advertising cookies (such as the DoubleClick cookie) enables it and its partners to serve personalized or non-personalized ads to users based on their visits to this site and other websites on the Internet.
• Users may opt out of personalized advertising by visiting Google Ads Settings or through AboutAds.info.
• For more information on how Google manages data in its advertising products, please visit Google's Privacy & Terms.

6. How We Use Your Information

Any information we collect is strictly used for the following purposes:

• To respond to your questions, feature suggestions, or formula feedback.
• To maintain website security, prevent fraud, and ensure server stability.
• To monitor aggregated, non-identifying traffic patterns to improve calculator performance.

We never sell, rent, trade, or monetize your personal information.

7. Data Security & Retention

We implement industry-standard SSL/TLS encryption across our entire domain to ensure all communications between your browser and our servers are encrypted. Contact form submissions are retained only as long as necessary to address your inquiry, after which they are deleted.

8. Your Privacy Rights (GDPR & CCPA/CPRA)

Depending on your location, you may have the following statutory rights regarding your personal data:

• Right of Access & Portability: You may request a copy of any personal data you have directly submitted to us.
• Right to Rectification & Deletion: You may request the correction or permanent deletion of your personal communications.
• Right to Restrict or Object: You may object to the processing of your data.
• Non-Discrimination: We will never discriminate against you for exercising your privacy rights.

To exercise any of these rights, please email us at contact@molecularweightcalculator.net. We respond to all verified requests within statutory timeframes (30 days or less).

9. Children's Privacy

Our website is designed for general audience educational and laboratory use. We do not knowingly collect personal identifiable information from children under the age of 13 (or under 16 in certain jurisdictions) in compliance with the Children's Online Privacy Protection Act (COPPA). If you believe a child has submitted personal information to us, please contact us immediately for prompt deletion.

10. Third-Party Links

Our educational articles and tool pages may contain reference links to external resources (such as IUPAC databases, academic publications, or NIST tables). We have no control over the privacy practices of external websites and encourage you to review their respective policies.

11. Updates to This Privacy Policy

We may periodically update this policy to reflect changes in our tools, legal regulations, or advertising partner requirements. Any revisions will be published on this page with an updated effective date.

12. Contact Information

If you have questions, comments, or requests regarding this Privacy Policy or our data practices, please contact us at: