Cookies & Storage Policy
Understand how we use cookies, browser local storage, and client-side data to power our chemical calculation tools.
Privacy Guarantee: At Molecular Weight Calculator, we are committed to full transparency regarding how we store data and maintain your privacy. We do not use invasive tracking or sell user data.
1. What Are Cookies and Local Storage?
Cookies are small text files placed on your device by websites you visit. Local Storage (HTML5) is a secure browser mechanism that allows web applications to store key-value data directly on your device without sending it back and forth to a web server on every request.
2. How We Use Storage on This Website
Our chemistry calculators run completely client-side in your web browser. We use local storage and essential cookies strictly to enhance your experience, maintain your selected preferences, and ensure optimal site reliability.
3. Categories of Cookies and Storage We Use
Strictly Necessary / Functional Storage
Enables core website features, such as remembering your Cookie Consent preference (so the banner is not displayed again) and caching element atomic mass data for lightning-fast calculations.
Local Calculation Processing
All chemical formulas, stoichiometric calculations, and compound inputs are processed locally in your browser memory. We never transmit, store, or log your chemical inputs on our servers.
Performance & Aggregate Analytics
We may use privacy-respecting, anonymized metrics to monitor server uptime, page loading speeds, and overall traffic patterns without profiling individual users.
4. Inventory of Browser Storage Items
| Key / Cookie | Technology | Purpose | Duration |
|---|---|---|---|
| cookie-consent | localStorage | Remembers that you acknowledged the cookie consent banner so it does not reappear. | Persistent (1 year) |
| session-calc-cache | Browser Memory | Temporary memory caching for IUPAC atomic masses to calculate molecular weights instantaneously. | Session only |
| locale-preference | URL / Navigation | Maintains your selected language when navigating the chemistry calculator pages. | Persistent |
4. How to Manage and Disable Cookies
You can control, restrict, or delete cookies and local storage through your browser settings. You can clear your browser's site data at any time to reset your cookie consent choices.
- Google Chrome: Settings → Privacy and security → Third-party cookies / Clear browsing data.
- Mozilla Firefox: Settings → Privacy & Security → Cookies and Site Data.
- Apple Safari: Settings → Safari → Advanced → Website Data.
- Microsoft Edge: Settings → Cookies and site permissions → Manage and delete cookies and site data.
5. Questions and Contact
If you have questions about our Cookies Policy or data practices, please contact us at contact@molecularweightcalculator.net.