Read and Write GMSH Mesh files

GMSH_IO is a FORTRAN90 library which can read and write the files used by the GMSH meshing program.


The computer code and data files made available on this web page are distributed under the GNU LGPL license.


GMSH_IO is available in a C version and a C++ version and a FORTRAN77 version and a FORTRAN90 version and a MATLAB version.

Related Data and Programs:

DOLFIN-CONVERT, a Python program which can convert a mesh file from Gmsh, MEDIT, METIS or SCOTCH format to an XML format suitable for use by DOLFIN or FENICS, by Anders Logg.

FEM_TO_GMSH, a FORTRAN90 program which reads FEM files definining a 1D, 2D or 3D mesh, namely a file of node coordinates and a file of elements defined by node indices, and creates a Gmsh mesh file.

GMSH, examples which illustrate the use of the Gmsh program, a 1D, 2D or 3D mesh generator that can create meshes suitable for use by the finite element method (FEM).

GMSH_TO_FEM, a FORTRAN90 program which reads a mesh data file created by the GMSH program and writes a pair of node and element files that correspond to the FEM format.

MSH, a data directory of examples of MSH files, the native 3D mesh format used by Gmsh.

TETHEX, examples which illustrate the use of TETHEX, a C++ program which can read a Gmsh file defining a mesh of triangles or tetrahedrons, and subdivide the mesh into quadrilaterals or hexahedrons, which are suitable for use by the DEALII finite element program, by Mikhail Artemiev.


  1. Christophe Geuzaine, Jean-Francois Remacle,
    Gmsh: a three-dimensional finite element mesh generator with built-in pre- and post-processing facilities,
    International Journal for Numerical Methods in Engineering,
    Volume 79, Number 11, pages 1309-1331, 2009.

Source Code:

Examples and Tests:

List of Routines:

You can go up one level to the FORTRAN90 source codes.

Last revised on 16 October 2014.