Solidworks Weights

[JesseK]

Is there a way I can tell solidworks that a part weighs a certain amount without having to put in a density? For fast CAD'ing, I know how much components weigh because I can weight them; but finding their volume is another matter and it's faster to simply weigh each piece and put it in a spreadsheet and create a simple representation of the part without all the nooks and crannies.

However, since I want to be able to simply go to our final robot drawing and then "mass properties" to get the weight, a spreadsheet will not suffice. I'd also like to put the weight on the bill of materials.

Any ideas?