I need a checkbox formula that will check box if a drop down field is empty OR NOT one of the options from the drop down field.

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Posted 3 years ago

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The purpose of a dropdown field, meaning a multiple choice field, is that you're limited to select something from just that list of options. How would you get a value in there other than the choices listed?

As far as the checkbox formula goes, the "is empty" part looks like this: [TextFieldName]="". If you've changed your multiple choice selection options and want to see which are no longer valid, place your field into a report. QuickBase is designed to display invalid selections with a red text.
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Matthew Neil

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The comment was missing the equation, but here is the full formula to evaluate a "blank" answer.

If([Text Multiple-Choice Field]="", true, false)

If you wanted to Have multiple evaluations (or "If" statements) you can use a Case formula;

Case([Text Multiple-Choice Field],

"", true,

"Happy", true,

"Crazy", true,


This basically says, if the answer is "blank", "Happy" or "Crazy", check the box (true), all other responses will leave it un-checked (false).