GAMESS Output chemical modeller file
File type: Various data file
The .gamout file extension identifies an output file produced by GAMESS (General Atomic and Molecular Electronic Structure System), a software package for computational chemistry.
The file contains the textual results of a GAMESS calculation and is intended for reviewing or processing the calculation output.
File type category:
Various data file
Date updated: October 2, 2026
GAMESS is a quantum-chemistry package used to calculate electronic structures and other properties of molecules. A .gamout file is its calculation output rather than an input file or a general-purpose chemical model format.
The output can contain information such as calculation settings, molecular geometry, energies, convergence details and other results produced by the selected GAMESS methods. It is normally a text-based report, although some sections may be intended for use by chemistry visualisation or analysis software.
The format is closely tied to GAMESS output and is not a broadly standardised exchange format. Its contents and usefulness depend on the calculation that generated it.
MIME: chemical/x-gamess-input
A .gamout file can usually be opened as text with a plain-text editor because GAMESS output is text-based. This is suitable for reading the calculation log and results, but it does not provide molecular visualisation or specialised result analysis.
For structured analysis or visualisation, open the file with chemistry software that supports GAMESS output. A completed output file is primarily a report rather than a project document that is edited directly.
A .gamout file is an output report, so it does not have a single reliable conversion to another chemical format. Selected coordinates or results may be extracted with suitable chemistry-analysis software and saved in another format.
It cannot generally be converted back into a complete GAMESS input file without rebuilding the calculation settings and checking the molecular data manually.
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