https://forums.autodesk.com/t5/inventor-forum/inertial-properties-w-in-i-properties/m-p/2833485#M395135 <P>I am wondering if there if there is a units setting to change Principal moments value&nbsp;that is populated in the I-properties tab. The units that Inventor shows is lbmass in^2, where as I am familiar with seeing&nbsp;I=in^4, which designates the distance to outermost fiber of cross section from centroid. Anyone have any sugestions or&nbsp;some mathematical input on where these values are being derived.</P> Mon, 22 Nov 2010 21:14:29 GMT Anonymous 2010-11-22T21:14:29Z https://forums.autodesk.com/t5/inventor-forum/inertial-properties-w-in-i-properties/m-p/2833485#M395135 <P>I am wondering if there if there is a units setting to change Principal moments value&nbsp;that is populated in the I-properties tab. The units that Inventor shows is lbmass in^2, where as I am familiar with seeing&nbsp;I=in^4, which designates the distance to outermost fiber of cross section from centroid. Anyone have any sugestions or&nbsp;some mathematical input on where these values are being derived.</P> Mon, 22 Nov 2010 21:14:29 GMT https://forums.autodesk.com/t5/inventor-forum/inertial-properties-w-in-i-properties/m-p/2833485#M395135 Anonymous 2010-11-22T21:14:29Z https://forums.autodesk.com/t5/inventor-forum/inertial-properties-w-in-i-properties/m-p/2833725#M395136 <P>If you only want second moment of area, create a sketch on the profile -&gt; Inspect Tab -&gt; Region Properties. This will give you units of in^4 for the cross section.</P> Tue, 23 Nov 2010 04:54:56 GMT https://forums.autodesk.com/t5/inventor-forum/inertial-properties-w-in-i-properties/m-p/2833725#M395136 Inv_kaos 2010-11-23T04:54:56Z