When you add parts to a piece Craft Maker Pro can use the weights and volumes of the parts to calculate a sum total.

 

These may also be converted but it is far more accurate to try and keep all parts in a similar measurement unit if possible.

 

Weight Example:

 

 

Volume Example:

 

 

These details are then displayed in the Dimensions Weights and Volumes Tab for any invoices so the data can be used to calculate postage if required or used to display with an items sale details and catalogs.

 

Invoice details: