LN DAX Function (Math and Trig)

Returns the natural logarithm of a number.


LN ( <Number> )
Parameter Attributes Description

The positive number for which you want the natural logarithm.

Return values

Scalar A single decimal value.

The natural logarithm of the number passed as an argument.


Returns the natural logarithm of a number.
Natural logarithms are based on the constant e (2.71828182845904).
LN is the inverse of the EXP function.
If the number is less than or equal to zero, the function generates an error.

» 3 related functions


--  Logarithmic functions include LOG10, LN, LOG, and EXP to compute
--  logarithms using various bases or exponential.
    VAR Vals = GENERATESERIES ( 1, 25, 4 )
    "LN",       LN      ( [Value] ),
    "LOG10",    LOG10   ( [Value] ),
    "LOG 5",    LOG     ( [Value], 5 ),
    "EXP",      EXP     ( [Value] )

Value LN LOG10 LOG 5 EXP
1 0.00 0.00 0.00 2.72
5 1.61 0.70 1.00 148.41
9 2.20 0.95 1.37 8,103.08
13 2.56 1.11 1.59 442,413.39
17 2.83 1.23 1.76 24,154,952.75
21 3.04 1.32 1.89 1,318,815,734.48
25 3.22 1.40 2.00 72,004,899,337.39

Related functions

Other related functions are:

Last update: Apr 11, 2024   » Contribute   » Show contributors

Contributors: Alberto Ferrari, Marco Russo, Kenneth Barber,

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

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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.


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