Volume of a 3D closed mesh car object

Question

I have a 3D closed mesh car object having a surface made up triangles. I want to calculate its volume, center of volume and inertia tensor.

Could you help me

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Answer 1

I think it was Archimedes who discovered that if you submerge the car in a volume of liquid, the displaced liquid will have the same volume as the car.

I'm not sure what this would help you in this case though. Having a liquid simulation running in the background and submerging the mesh into it sounds a bit over the top. Although, I think it does work, and therefore qualifies as a (bit useless nonetheless) answer. ;^)