# Analysis Wizard : Mass Calculation
A mass analysis calculates the mass and mass distribution in the structure.
# Definition
Mass Option
This specifies how the mass of the elements is to be included. A scale factor can be applied to modify the element masses. This is typically used to increase the mass, for example to allow for connections.
Mass Derived from Loads
In addition to the mass of the elements, extra mass can be inferred from loads (Case definition) applied in a particular direction, with a scale factor if required.