If you lack institutional credentials, you must purchase a license directly from the vendor: G16W System Requirements - Gaussian.com
Once you have purchased a license or obtained access through your university, you will typically receive a download link or physical media containing the installer.
Double-click the setup file and follow the prompts. You will likely need to enter your serial number provided during purchase.
Searching for a "Gaussian 16W download" is a mistake.
Use the interface to build your molecule or edit .gjf (Gaussian Job File) input files. Run Calculations: Load your input file and start the job.
Windows 10, Windows 11, or Windows Server equivalents (64-bit strongly recommended).
Common for universities; allows any student or faculty member on campus to use the software.
Unlike the command-line interface on Linux, 16W provides a tailored interface that makes managing input files, running jobs, and viewing output easier for Windows users.
: Many universities and research institutions hold site licenses that allow their faculty, staff, and students to use the software for educational and non-commercial research. For example:
Check with your university's IT department, research computing center, or chemistry lab manager.
If you are a student or researcher needing Gaussian 16W for work, do not risk your computer or your career on a shady download.
Navigate to the products or ordering section to request a quote.
Double-click the setup.exe or equivalent installation file downloaded from Gaussian, Inc.