# Calculated Field
Get started with FlexReport, a WinForms control, which is a fast-paced reporting engine that enables you to create, preview, export and print modern and dynamic reports for all your applications. See more in documentation here.
## Content
In order to create fields that do not use raw data, **Calculated** fields are the best option. Calculated fields contain expressions that are evaluated at run-time. They are used to generate those data values that are not stored in the data base.
## Add Predefined Calculated Field
Some predefined expressions are available in the dropdown of Calculated Fields. To add such fields, follow the steps below:
1. Create a new FlexReport in FlexReportDesigner.
2. From **Insert** tab, add two **Calculated** fields  - 'Date Created' and 'Page n of m', in the PageFooter section:
3. Note the expressions in these calculated fields in the design area.
4. Preview the report.
## Add Custom Calculated Field
To define a Calculated field and add the field in the FlexReport Designer application:
1. Create a new report.
2. Bind the report with '**Orders Details**' Table.
3. In Group Header, add a **Text** field 'Total' to display label for the total price.
4. Go to **Data** tab, and right-click the Main data source and select **Add Calculated Field**. VBScript Editor appears.
5. In the **VBScript Editor**, write the following expression:
`Quantity*UnitPrice`
6. Drop the above mentioned Calculated field as shown.
7. Preview the report.
