How do I Add a Calculation Field in Adobe Acrobat?by Heather Hanlon
Create or import the basic form structure in Adobe Acrobat.
Double-click the field in which to add a calculation. The "Text Field Properties" dialog box appears.
Click the "Calculate" tab. This converts the field from a standard text field into a calculation field.
Enable "Value is the (option) of the following fields" if this field is to be a product of other fields. Options are a selection between sum, product, average, minimum and maximum.
Enable "Simplified Field Notation" if this field is to be a complex calculation using standard math symbols and grouping.
Enter the notation, using field names as operands. For example, (Field_1 + Field_2)/Field_3.
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