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filter

A quick reference for the Notion filter function, including syntax, purpose, return value, and examples.

Quick reference

ItemDetails
Functionfilter()
CategoryLists
Syntaxfilter(list, condition)
PurposeFilter a list
Return valueList

Official example of the filter function in the Notion formula editor

Examples and notes

filter() keeps only the items that match a condition.

prop("Tasks").filter(current.prop("Status") == "Completed")

Count completed tasks:

prop("Tasks").filter(current.prop("Status") == "Completed").length()

To use these formulas directly in task reminders, project progress, note heatmaps, and reports, continue with FLO.W Notion Template.

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