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How to get differences of two dates

Hi, I have a date field that I need to update based on differences between two dates. How do I do that in flow? 


I have Start Date and End Date.

I need to update the new field , Interim Date: End Date- Start Date.

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To do this in Microsoft Flow (currently called Power Automate) you can refer to the below where it has been answered:


how to get difference between two dates in flow 


If you meant Power Apps Canvas App instead:


For Canvas App:


Use the DateDiff function.




DateDiff( StartDateTime, EndDateTime [, Units ] )

  • StartDateTime - Required. Starting date/time value.
  • EndDateTime - Required. Ending date/time value.
  • Units - Optional. The type of Units to add: Milliseconds, Seconds, Minutes, Hours, Days, Months, Quarters, or Years. If not specified, Days are used.


@poweractivate put it in the update record is it? 

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