LEN DAX Function (Text)

Returns the number of characters in a text string.


LEN ( <Text> )
Parameter Attributes Description

The text whose length you want to find. Spaces count as characters.

Return values

Scalar A single integer value.

The number of characters in the text string.

» 1 related article


--  LEFT, RIGHT, MID and LEN are the basic string-manipulation functions
    VAR Val = "DAX is so cool!"
    ( "LEFT ( Val, 3 ) ",   LEFT  ( Val, 3     ) ),
    ( "RIGHT ( Val, 5 )",   RIGHT ( Val, 5     ) ),
    ( "MID ( Val, 11, 4 )", MID   ( Val, 11, 4 ) ),
    ( "LEN ( Val )",        LEN   ( Val        ) )
Value1 Value2
LEFT ( Val, 3 ) DAX
RIGHT ( Val, 5 ) cool!
MID ( Val, 11, 4 ) cool
LEN ( Val ) 15

Related articles

Learn more about LEN in the following articles:

Last update: Jul 12, 2024   » Contribute   » Show contributors

Contributors: Alberto Ferrari, Marco Russo

Microsoft documentation: https://docs.microsoft.com/en-us/dax/len-function-dax

2018-2024 © SQLBI. All rights are reserved. Information coming from Microsoft documentation is property of Microsoft Corp. » Contact us   » Privacy Policy & Cookies

Context Transition

This function performs a Context Transition if called in a Row Context. Click to read more.

Row Context

This expression is executed in a Row Context. Click to read more.


Not recommended

The use of this function is not recommended. See Remarks and Related functions for alternatives.

Not recommended

The use of this parameter is not recommended.


This function is deprecated. Jump to the Alternatives section to see the function to use.


A volatile function may return a different result every time you call it, even if you provide the same arguments. Click to read more.


This parameter is deprecated and its use is not recommended.

DirectQuery compatibility

Limitations are placed on DAX expressions allowed in measures and calculated columns.
The state below shows the DirectQuery compatibility of the DAX function.


Want to improve the content of LEN? Did you find any issue?
Please, report it us! All submissions will be evaluated for possible updates of the content.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.