# Numerical Calculations

Want to calculate the numerical value for a field based on prior variables?  Use invisible logic. Or, you can do so by entering your mathematical equation in the format below.  Remember to set your variables as Number questions in your interview.

Use any combination of + - * and / to create calculations in your documents.

This field will display the value of variable1 plus variable2:

{{ (variable1 + variable2)|float }}

Multiplication/Division

This field will display the value of 100 times variable1 divided by variable2 (useful for a percentage):

{{ (100 * variable1/variable2)|float }}

Round Down

This will round the number down (floor) and leave 2 decimal points:

{{(variable)|round(2, 'floor') }}

Round Up

This will round the number up (ceiling) and leave 2 decimal points:

{{(variable)|round(2, 'ceil') }}

To The Power Of

This will take variable1 to the power of variable2 (either could be replaced with an actual number):

{{ (variable1**variable2)|float }}