Download Gaussian 16 Windows May 2026

By following these steps, you should be able to successfully download and install Gaussian 16 on your Windows system.

Software Specifications

Gaussian 16 for Windows (G16W) is a professional electronic structure modeling software that requires a valid, paid license for use . There is no official free trial or free version

available for general download. To obtain the software, you must purchase a license through Gaussian, Inc. or an authorized sales agent, after which you will receive the installation media (typically a DVD or secure download link) and a unique serial number. Gaussian.com How to Acquire Gaussian 16 for Windows Gaussian 16 download gaussian 16 windows

Windows is not the native platform for high-performance computing (Linux is faster), but with proper settings, you can achieve respectable speeds.

✅ License obtained from Gaussian, Inc.
✅ Downloaded from official portal (not third-party sites)
✅ WSL2 enabled (if using recommended method)
✅ Scratch disk space available (50+ GB for large jobs)
✅ Antivirus temporarily disabled during extraction (false positives may occur)

Need help? Licensed users can email help@gaussian.com or post on the official Gaussian forum. By following these steps, you should be able

Last updated: 2025

Here are concise, actionable steps and resources for downloading and installing Gaussian 16 on Windows, plus alternatives and licensing notes.

If licensing costs or institutional restrictions prevent you from downloading Gaussian 16, consider these options: Gaussian 16 for Windows (G16W) is a professional

| Software | Free? | Windows Native? | Notes | |----------|-------|----------------|-------| | ORCA 5.0+ | Yes (academic) | via WSL2 | Very popular, DFT, post-HF | | PSI4 | Yes | via WSL2 | Python-driven, open-source | | NWChem | Yes | via WSL2 | Scalable, good for periodic | | GAMESS | Yes | Native .exe | Older interface, but powerful | | CP2K | Yes | via WSL2 | Best for large systems/DFT |

These cannot run Gaussian input files directly, but they can achieve similar computational chemistry goals.

Technically, yes, but Windows 11 Pro is recommended for better process management and larger memory support.