FLOOR DAX Function (Math and Trig)

Rounds a number down, toward zero, to the nearest multiple of significance.

Syntax

FLOOR ( <Number>, <Significance> )
Parameter Attributes Description
Number

The number you want to round.

Significance

The multiple to which you want to round. Number and significance must either both be positive or both be negative.

Return values

Scalar A single decimal value.

Number down to requested significance

Remarks

The functions always returns a decimal data type, regardless of the arguments.

» 7 related functions

Examples

--  Rounding functions, using multiples of the second argument
--
--  FLOOR returns the smaller multiple
--  MROUND returns the nearer multiple (does not work with negative values)
--  CEILING returns the larger multiple
--  ISO.CEILING is like CEILING, handles differently negative numbers
DEFINE VAR Vals = GENERATESERIES ( 5, 20, 2 )
EVALUATE    
    ADDCOLUMNS (
        Vals,
        "FLOOR",        FLOOR       ( [Value], 3 ),
        "MROUND",       MROUND      ( [Value], 3 ),
        "CEILING",      CEILING     ( [Value], 3 ),
        "ISO.CEILING",  ISO.CEILING ( [Value], 3 )   
    )
Value FLOOR MROUND CEILING ISO.CEILING
5 3 6 6 6
7 6 6 9 9
9 9 9 9 9
11 9 12 12 12
13 12 12 15 15
15 15 15 15 15
17 15 18 18 18
19 18 18 21 21
--  When the significance is negative, CEILING and ISO.CEILING
--  behave differently
--  
--  CEILING rounds towards the smaller value ISO.CEILING rounds towards
--  the largest one. This is important with negative significance
DEFINE
    VAR Vals = GENERATESERIES ( -20, 0, 3 )
    VAR Significance = -3
EVALUATE
    ADDCOLUMNS (
        Vals,
        "FLOOR",        FLOOR       ( [Value], Significance ),
        "CEILING",      CEILING     ( [Value], Significance ),
        "ISO.CEILING",  ISO.CEILING ( [Value], Significance )
    )

Value FLOOR CEILING ISO.CEILING
-20 -18 -21 -18
-17 -15 -18 -15
-14 -12 -15 -12
-11 -9 -12 -9
-8 -6 -9 -6
-5 -3 -6 -3
-2 0 -3 0

Related functions

Other related functions are:

Last update: May 12, 2021   » Contribute   » Show contributors

Contributors: Alberto Ferrari, Marco Russo

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

Iterator

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.

Deprecated

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

Deprecated

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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