Similar to rollups fields, calculated fields are another recent addition to Dynamics 365's configuration capabilities that significantly reduces the need for custom code extensions.

As the name suggests, calculated fields allow you to set the value of an attribute based on another field, a function, or a formula. Furthermore, calculated fields may trigger based on a set of conditions.

In this example, we will configure a field to calculate the difference in months between two dates: (student start date, and student end date).