**Center of mass**, also known as center of gravity, may be located using the following process:

- Create the structural model and run analysis.
- Use "Display > Show Tables" command to export, into Excel, the following tables:
- Model Definition > Connectivity Data > Joint Coordinates >
**Table: Joint Coordinates** - Analysis Results > Joint Output > Joint Masses >
**Table: Assembled Joint Masses**

- Model Definition > Connectivity Data > Joint Coordinates >
- In Excel, calculate the location of the center of mass (com) for each coordinate direction. Use a weighted average in which assembled joint mass is the weight. For example, the x-coordinate of center of mass (x
_{com}) may be calculated as follows:

where:

**x**= x coordinate of individual joints**m**= mass of individual joints

- Center-of-gravity determination tutorial