# Using the Calculate Rule¶

Users can create Calculate rules that populate a numeric field by calculating its value based on other fields. For example, a Calculate rule can calculate a camp or conference’s total registration costs by multiplying the number of attendees and the registration fee (17 people at $130 each).

Important

Calculations are limited to numeric fields.

This example has a form with three numeric fields:

*Number of attendees*: a numeric field.*Registration Fee*: a numeric field with a predefined value of 150.*Total*: a numeric field where the total will be displayed.

## Configuring the Calculate Rule¶

The calculation is defined using the embedded calculator. Use a mix of numeric field values, mathematical operators, and constants to define calculation rules.

Follow the steps below:

Click the

*Rules*tab.Click the Add () button.

Select the

*Number of attendees*from the*If*dropdown menu.Create the condition:

*Is greater than*→*Value*→*0*.Select

*Calculate*from the*Do*dropdown menu.Select

*Total*from the*Choose a Field to Show the Result*dropdown menu.Using the embedded calculator, enter

**(NumberofAttendees*RegistrationFee)**.Click

*Save*when finished.

The Calculate Rule has been created.