# Geometry units/what is the real-life size of geometry

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 May 4, 2016, 16:08 Geometry units/what is the real-life size of geometry #1 New Member   Grega Verdenik Join Date: Apr 2016 Posts: 4 Rep Power: 9 Hey guys, I'm new to OpenFOAM and trying to understand its internal workings. My question is- how do I know how big my geometry is in openFOAM? Let's say I build a cube geometry using gmsh and import it into openFOAM. The point coordinates of the front face are A(0,0,0), B(2,0,0), C(2,2,0), D(0,2,0) and etc for other faces of the cube. I would like to know, what is the unit of that length 2...is it meters, millimeters, or is it not defined that way at all? Any help would be greatly appreciated, thanks! Greg

 May 4, 2016, 21:19 #2 Senior Member     Kyle Mooney Join Date: Jul 2009 Location: San Francisco, CA USA Posts: 323 Rep Power: 16 It'll be in meters by default.

 May 5, 2016, 00:20 #3 New Member   Grega Verdenik Join Date: Apr 2016 Posts: 4 Rep Power: 9 Ok that makes sense- thank you!

 Tags dimensions, geometry scale, scaling, units