Power BI DAX LEN function returns the length of a given string. It comes under Text DAX functions category.
Syntax:
LEN(string)
Description:
S no. | Parameter | Description |
1 | Text | The text whose length you want to find. Spaces count as characters. |
Let’s start with an example:
Step-1: Sample Dataset as below:

Sample Dataset for DAX String Functions
Step-2: Create a New column, right click on Dataset & click on New column.
Step-3: Now, to determine the length of a character string in the “Product Sub Category” name column, you can use the following DAX expression:
Len_Dax = LEN(Orders[Product Sub-Category])
Step-4: Add a new column to the Table visual, then right-click on the newly added column within the “Values” section. Select “Don’t Summarize” from the context menu.

Len Example
Step-5: Output as below

LEN Function Example
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