Square Duct Flow Rate Calculator

You will need the following data for the form:

The length of a side of the duct, in inches.

The differential pressure across the duct (in WC)

Fill in the two fields below and click the "Calculate Flow" button. The results of each calculation will be prepended to the Results scrollbox. When you are finished, click on the "List Results" button, and you will be sent to a page containing the results of all your calculations.