LOG DAX Function (Math and Trig)

Returns the logarithm of a number to the base you specify.


LOG ( <Number> [, <Base>] )
Parameter Attributes Description

The positive number for which you want the logarithm.

Base Optional

The base of the logarithm; if omitted, 10.

Return values

Scalar A single decimal value.

Logarithm of number to the base specified.


The function LOG10 is similar, but always returns the logarithm for the base 10.

Related functions

Other related functions are:

Last update: Sep 15, 2020   » Contribute   » Show contributors

Contributors: Alberto Ferrari, Marco Russo

MSDN documentation: https://docs.microsoft.com/en-us/dax/log-function-dax

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.


This parameter is deprecated and its use is not recommended.


Want to improve the content of LOG? 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.