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Calculate cost par custom conversion on Facebook


I have created several custom conversions on my website.

My goal is to be able to define the cost per custom conversion using supermetrics and google data studio. But I have an error : "Community connector error: Invalid field combination: spend or action rate can't be fetched when splitting by action dimensions (action_type), only actions or action values can be fetched; IllegalDimensionMetricCombinationException...

This is really annoying since I have the Number of custom conversion using the purchase conversion filtered by the ID of the custom one, and I have the total budget spent. All I need to do is to divide the amount spent by the sum of custom conversions but I didn't manage to find how without getting an error! If someone can help me on this, this would be really awesome.


Hi Benjamin,

Unfortunately some metrics are restricted to particular dimensions.

Please see this article for further tips on custom conversions.

Best regards,

Supermetrics Team

Hi Supermetrics,

You need to solve this in an easy matter for the users. 

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But wouldn't it be possible for you to add the following metrics (like all the custom conversions and all the cost per custom conversion) without needed to use filter with action type or conversion specs?

Some tools give this data so it should exist in the Facebook API.
It is really a crucial aspect for our dashboards.


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