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Hi beloved Airtable Community!

I’ve got an issue with a VALUE formula.


I have a Rollup field that does a ARRAYUNIQUE job from a Lookup Field which is formatted as a % (i.e. 36%).

The output I get from the Rollup field is a string (i.e. 0.357142852346992).

I tried various ways to convert it back to a number like:



  1. Within the formula of the Rollup, try VALUE(ARRAYUNIQUE(values))

  2. Create a new formula field that performs VALUE(ROLLUP FIELD)

    But both outputs give me “#ERROR


I’ve read some articles about VALUE behavior but not sure to understand how it might help in that particular case.


Would you have any hints?

Thanks a lot, appreciate it!

Can you post a screen shot? If you are rolling up a number field, you should not be getting a string with the formulas you have posted. Instead, you may be getting an array of numbers (even if it looks like a single number).


Try this formula in the rollup …


MAX(ARRAYUNIQUE(values))

or this formula …


VALUE(ARRAYJOIN(ARRAYUNIQUE(values), "")

Hi kuovonne,

Many thanks for your help, MAX function worked it out!

No idea why that worked - and not VALUE - but I’ll remember the trick :winking_face:

Have a nice day!


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