Measure Volume

(3D only) Used to measure the volume enclosed by an element or a set of elements and to analyze mass properties. The element(s) must completely enclose a volume; if a volume is not enclosed, a message appears in the status bar. Meshes with inconsistent normals are considered invalid for volume reporting. Such meshes should be fixed using the Change Mesh Normal tool before measuring volume.

You can access this tool from the following:

Ribbon: Drawing > Analyze > Measure
Toolbox: Measure

Setting	Description
Mass Properties	If on, the Mass Properties window displays the mass property analysis for the measured volume.
Display Center Of Mass	If on, a graphic crosshair that represents the center of mass for the measured element(s) is displayed.
(Technology Preview) Use reference scale	Allows users to measure in true model units while in a Sheet model that contains a scaled reference file. This checkbox is off by default. Note: This setting is only applicable in the Sheet models.
Volume Unit	Sets the units used to display the last volume measured. cubic <master units> cubic m — (Metric units only) Cubic meters. Liter — (Metric units only) Gallon (US) — (English units only) Gallon (UK) — (English units only) US Barrels (Oil) — (English units only): [1 bbl (US Oil) = 158.987L] US Barrels (Federal) — (English units only): [1 bbl (US Federal) = 117.347L]
Volume	Displays the result of the last volume measured. The unit of measurement displayed in this field can be controlled by the MS_MEASURE_AREA_UNIT2 configuration variable.

Key-in: MEASURE VOLUME