Using built-in calculation formulas

Calculations involve, in one-way or another, the use of text fields. You can perform a calculation using any field type, but if you want the results of your calculations reported on a form, you need to have a text field that either calculates the data and places the result in the field performing the calculation, or calculate data in another field type and send the data to a text field.

To create a calculation:

1. Select the Text Field tool from the Nitro PDF Professional toolbar and drag open a rectangle in the location where you want to add the button.
2. Name the field and set General and Appearance properties.
3. Select Options and click Alignment. Select Right from the pull-down menu to align the values right.
4. Open the Format properties, click Select format category, and then select Number from the drop down menu.
5. Click Decimal places and type the number of decimal places you want to report in the calculated field.
6. Open the Calculate properties, and select Value type and do one of the following:
• Click Sum (+) to sum a group of data.
• Click Product (x) to multiply values.
• Click average to average a group of field values.
• Click minimum to report the minimum value among a group of fields
• Click maximum to report the maximum value among a group of fields.
7. Click the Pick option to open the Field Selection dialog box. Hold down the Control or Shift key and click each field you want to calculate.
8. Click OK.