DAX Funnel Drop-off % Measure

Expresses the percentage of users lost between one funnel stage and the next.

MarketingIntermediatefunneldrop-offpercentage

DAX code

Funnel Drop-off % =
VAR StageCount = CALCULATE(COUNTROWS('FunnelEvents'), 'FunnelEvents'[Stage] = SELECTEDVALUE('Stages'[StageName]))
VAR PreviousStageCount = CALCULATE(COUNTROWS('FunnelEvents'), 'FunnelEvents'[Stage] = SELECTEDVALUE('Stages'[PreviousStageName]))
RETURN
    1 - DIVIDE(StageCount, PreviousStageCount)

Notes

Requires a Stages table listing each funnel step and its preceding step, joined to the funnel event log.

Requirements

A FunnelEvents table and a Stages lookup table.

How to use this measure

In Power BI Desktop, select the table that should hold the measure and choose New measure on the ribbon.
Paste the code, then replace the placeholder table and column names with your own. The My table names fields above do this for you.
Run it through the DAX Formatter if you want it laid out in your team's style.

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