We’ve been over this, and the answer is unlikely to change:
As for…
Rhino 8:
Command: Volume
Select solids or solid meshes for volume calculation ( Units=ModelUnits ): u
Units ( ModelUnits Micron Millimeter Centimeter Liter Decimeter Meter Kilometer Microinch Mil Inch Foot Yard Mile ): Liter
Select solids or solid meshes for volume calculation ( Units=Liter )
Select solids or solid meshes for volume calculation. Press Enter when done ( Units=Liter )
Calculating volume… Press Esc to cancel
Volume = 0.001384 (+/- 1e-12) liters