gmsh man page

Gmsh — 3D finite element mesh generator with built-in CAD engine and post-processor


gmsh [file(s)] [option(s)]


Gmsh is a 3D finite element grid generator with a build-in CAD engine and post-processor. Its design goal is to provide a fast, light and user-friendly meshing tool with parametric input and advanced visualization capabilities.

Gmsh is built around four modules: geometry, mesh, solver and post-processing. The specification of any input to these modules is done either interactively using the graphical user interface or in ASCII text files using Gmsh's own scripting language.

Geometry Options

parse all input files, output unrolled geometry, and exit.
-tol float
set geometrical tolerance.

Mesh Options

perform the one-dimensional mesh, i.e., discretize all the curves in the geometry.
perform the two-dimensional mesh, i.e., discretize all the surfaces in the geometry.
perform the three-dimensional mesh, i.e., discretize all the volumes in the geometry.
-part int
partition the mesh after batch mesh generation.
save all elements (and discard all physical group definitions).
-o file
specify mesh output file name.
-format string
set output mesh format (msh, msh1, msh2, unv, vrml, stl, mesh, bdf, p3d, cgns, med, fea).
use binary format when available.
-algo string
select mesh algorithm (meshadapt, del2d, front2d, del3d, front3d).
-smooth int
set number of mesh smoothing steps.
optimize quality of tetrahedral elements.
-order int
set mesh order.
-clscale float
set global scaling factor to the mesh characteristic lengths in the model.
-clmin float
Set minimum characteristic length.
-clmax float
Set maximum characteristic length.
Compute characteristic lengths from curvatures.
-rand float
set random perturbation factor.
-bgm file
load the post-processing view in file as the current background mesh.
perform various consistency checks on mesh.

Post-Processing Options

hide all views at startup.
-link int
choose link mode between post-processing views (0, 1, 2, 3, 4).
combine input views into multi-time-step ones.

Display Options

suppress the double buffer. Use this options if you use Gmsh on a remote host without GLX.
-fontsize int
specify the font size for the GUI.
-theme string
specify the FLTK GUI scheme.
-display string
specify display.

Other Options

parse input files, then exit.
-a, -g, -m, -s, -p
start in automatic, geometry, mesh, solver or post-processing mode.
print pid on stdout.
always listen to incoming connection requests.
-v int
set verbosity level.
don't popup dialog windows in scripts.
-string string
parse option string at startup.
-option file
parse option file at startup.
-convert files
Convert files into latest binary formats, then exit.
show version number.
show detailed version information.
show help message.


Christophe Geuzaine ( and Jean-Francois Remacle (

See Also

Gmsh examples (/usr/share/doc/gmsh-*/),
Gmsh homepage (

The full documentation for Gmsh is maintained as a Texinfo manual. If the info and gmsh programs are properly installed at your site, the command

info gmsh

should give you access to the complete manual.

Referenced By


17 July 2015 2.10 Gmsh Manual Pages