Licensed institutions can download maintenance updates and revision packages directly via the official Gaussian Inc. Client Portal .
If you are a student or researcher, you may already have free access through your organization:
: Licensed users typically receive physical media (DVD) or access to a secure, password-protected download portal provided by their institution or Gaussian, Inc. Verification : During installation, you must provide a valid Serial Number to proceed.
: Available as single-computer licenses or site licenses. A 32-bit version exists but is restricted to 2 GB of RAM and 16 GB of disk space. Institutional Access : Many universities (e.g., Waseda University
Always backup your previous g16w directory, especially custom default.gjf files.
Many universities and research institutions have purchased site-wide licenses for their faculty and students. This is the most common way for academic users to access the software. You can typically find the download files on your university's official software portal.
Gaussian releases updates via revision letters (e.g., moving from Revision A.03 to Revision C.01). These updates fix bugs and improve performance.
Locate , click Uninstall , and follow the prompts. Restart your computer to clear out active registry entries. Phase 3: Run the Updated Setup
Typically 2–4 times per year. Major revisions (e.g., B → C) occur every 1–2 years.
No. Gaussian 16W is professional, paid software. Beware of sites offering "free downloads" or "cracks," as these are often illegal and contain malware SourceForge . Can I run Gaussian 16W on Windows 11?
Compromised software can produce incorrect mathematical results, rendering your research invalid.
Or open the → Help → About .
: Once licensed, you will typically receive a physical DVD or access to a secure download portal provided by your institution or the manufacturer.