Weigh assembly in SolidWorks


It is not difficult to do. Here's how :
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Step 1:
Open your assembly. Expand the first part in the feature tree and click Edit Material - unless you see the appropriate one in the dropdown list, in which case you can select it there and skip the next step.
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Step 2:
Right click on Material .
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Step 3:
Select your material and click Apply. Here I've chosen Plain Carbon Steel. Close the Material dialog box. Repeat for all parts in the assembly.
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Step 4:
Click Rebuild, just to be on the safe side.
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Step 5:
Select Tools-->Mass Properties...
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Step 6:
Your mass will be shown here.
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Step 7:
Clicking Options in the Mass Properties dialog window will open the Options window. Select Use custom settings if you wish to change units, precision, etc.