Gaussian 16 Software Download Free |top| Jun 2026

GAMESS is a classic, open-source quantum chemistry package maintained by the Gordon Research Group at Iowa State University.

For simple calculations or educational purposes, web-based tools like MolCalc can be an easy way to get started without any installation.

These files often contain malware, ransomware, or spyware that can compromise your data. gaussian 16 software download free

Which (Windows, Linux, macOS) you plan to use?

A: Same answer—requires a paid license. However, ORCA runs beautifully on Linux for free. GAMESS is a classic, open-source quantum chemistry package

In these cases, the cheapest legal route is:

Research requires precision. Compromised software may produce subtle calculation errors that invalidate your scientific findings. Which (Windows, Linux, macOS) you plan to use

If you cannot access Gaussian through an institutional license and cannot afford a commercial license, several free and open-source quantum chemistry packages offer excellent alternatives.

Some research computing platforms offer pre-configured virtual machine (VM) images with Gaussian 16 pre-installed. For instance, one platform announced a pre-installed VM image with Gaussian 16, allowing users to run complex quantum chemistry calculations without performing the installation themselves. On certain dedicated platforms, no license fee is required to use Gaussian 16, making it available to any registered user of that system.