i'm away from my polyworks console this week and was asked by my sales guy to open an stl file and give him the volume of the part. i dont have solidworks yet :(. in all the time i have been working with this software, i have never even looked or noticed if it will give mass properties. will it?
A volume can be calculated in IMEdit. Even though you will get results if the mesh is not watertight, you should close at least the the largest holes.
i used inspect to volume calculations