# ROUNDDOWNDAX Function (Math and Trig)

Rounds a number down, toward zero.

## Syntax

ROUNDDOWN ( <Number>, <NumberOfDigits> )
Parameter Attributes Description
Number

Any real number that you want rounded down.

NumberOfDigits

The number of digits to which you want to round. Negative rounds to the left of the decimal point; zero to the nearest integer.

## Return values

Scalar A single decimal value.

The rounded number.

## Remarks

If NumberOfDigits is greater than 0 (zero), then number is rounded down to the specified number of decimal places.

If NumberOfDigits is 0, the number is rounded down to the nearest integer.

If NumberOfDigits is less than 0, the number is rounded down to the left of the decimal point.

» 7 related functions

## Examples

```--  Example with positive numbers
--
--  Argument for rounding functions:
--    positive: at a given number of decimal places
--    zero:     to the nearest integer
--    negative: rounds digits to the left of the decimal point
--
--  ROUND rounds to the nearest value
--  ROUNDDOWN always rounds down
--  ROUNDUP always rounds up
--  TRUNC truncates the decimal part, returning an integer
DEFINE
VAR Vals = GENERATESERIES ( 14.90, 16.01, 0.03 )
EVALUATE
Vals,
"ROUND 0",      ROUND     ( [Value],  0 ),
"ROUND +1",     ROUND     ( [Value],  1 ),
"ROUND -1",     ROUND     ( [Value], -1 ),
"ROUNDDOWN  0", ROUNDDOWN ( [Value],  0 ),
"ROUNDDOWN +1", ROUNDDOWN ( [Value],  1 ),
"ROUNDDOWN -1", ROUNDDOWN ( [Value], -1 ),
"ROUNDUP  0",   ROUNDUP   ( [Value],  0 ),
"ROUNDUP +1",   ROUNDUP   ( [Value],  1 ),
"ROUNDUP -1",   ROUNDUP   ( [Value], -1 ),
"TRUNC",        TRUNC     ( [Value]     )
)
ORDER BY [Value] ASC
```
Value ROUND 0 ROUND +1 ROUND -1 ROUNDDOWN 0 ROUNDDOWN +1 ROUNDDOWN -1 ROUNDUP 0 ROUNDUP +1 ROUNDUP -1 TRUNC
14.90 15 14.90 10 14 14.90 10 15 14.90 20 14
14.93 15 14.90 10 14 14.90 10 15 15.00 20 14
14.96 15 15.00 10 14 14.90 10 15 15.00 20 14
14.99 15 15.00 10 14 14.90 10 15 15.00 20 14
15.02 15 15.00 20 15 15.00 10 16 15.10 20 15
15.05 15 15.10 20 15 15.00 10 16 15.10 20 15
15.08 15 15.10 20 15 15.00 10 16 15.10 20 15
15.11 15 15.10 20 15 15.10 10 16 15.20 20 15
15.14 15 15.10 20 15 15.10 10 16 15.20 20 15
15.17 15 15.20 20 15 15.10 10 16 15.20 20 15
15.20 15 15.20 20 15 15.20 10 16 15.20 20 15
15.23 15 15.20 20 15 15.20 10 16 15.30 20 15
15.26 15 15.30 20 15 15.20 10 16 15.30 20 15
15.29 15 15.30 20 15 15.20 10 16 15.30 20 15
15.32 15 15.30 20 15 15.30 10 16 15.40 20 15
15.35 15 15.40 20 15 15.30 10 16 15.40 20 15
15.38 15 15.40 20 15 15.30 10 16 15.40 20 15
15.41 15 15.40 20 15 15.40 10 16 15.50 20 15
15.44 15 15.40 20 15 15.40 10 16 15.50 20 15
15.47 15 15.50 20 15 15.40 10 16 15.50 20 15
15.50 16 15.50 20 15 15.50 10 16 15.50 20 15
15.53 16 15.50 20 15 15.50 10 16 15.60 20 15
15.56 16 15.60 20 15 15.50 10 16 15.60 20 15
15.59 16 15.60 20 15 15.50 10 16 15.60 20 15
15.62 16 15.60 20 15 15.60 10 16 15.70 20 15
15.65 16 15.70 20 15 15.60 10 16 15.70 20 15
15.68 16 15.70 20 15 15.60 10 16 15.70 20 15
15.71 16 15.70 20 15 15.70 10 16 15.80 20 15
15.74 16 15.70 20 15 15.70 10 16 15.80 20 15
15.77 16 15.80 20 15 15.70 10 16 15.80 20 15
15.80 16 15.80 20 15 15.80 10 16 15.80 20 15
15.83 16 15.80 20 15 15.80 10 16 15.90 20 15
15.86 16 15.90 20 15 15.80 10 16 15.90 20 15
15.89 16 15.90 20 15 15.80 10 16 15.90 20 15
15.92 16 15.90 20 15 15.90 10 16 16.00 20 15
15.95 16 16.00 20 15 15.90 10 16 16.00 20 15
15.98 16 16.00 20 15 15.90 10 16 16.00 20 15
16.01 16 16.00 20 16 16.00 10 17 16.10 20 16
```--  Example with negative numbers
--
--  Argument for rounding functions:
--    positive: at a given number of decimal places
--    zero:     to the nearest integer
--    negative: rounds digits to the left of the decimal point
--
--  ROUND rounds to the nearest value
--  ROUNDDOWN always rounds down
--  ROUNDUP always rounds up
--  TRUNC truncates the decimal part, returning an integer
DEFINE
VAR Vals = GENERATESERIES ( -16.01, -14.90, 0.03 )
EVALUATE
Vals,
"ROUND 0",      ROUND     ( [Value],  0 ),
"ROUND +1",     ROUND     ( [Value],  1 ),
"ROUND -1",     ROUND     ( [Value], -1 ),
"ROUNDDOWN  0", ROUNDDOWN ( [Value],  0 ),
"ROUNDDOWN +1", ROUNDDOWN ( [Value],  1 ),
"ROUNDDOWN -1", ROUNDDOWN ( [Value], -1 ),
"ROUNDUP  0",   ROUNDUP   ( [Value],  0 ),
"ROUNDUP +1",   ROUNDUP   ( [Value],  1 ),
"ROUNDUP -1",   ROUNDUP   ( [Value], -1 ),
"TRUNC",        TRUNC     ( [Value]     )
)
ORDER BY [Value] ASC
```
Value ROUND 0 ROUND +1 ROUND -1 ROUNDDOWN 0 ROUNDDOWN +1 ROUNDDOWN -1 ROUNDUP 0 ROUNDUP +1 ROUNDUP -1 TRUNC
-16.01 -16 -16.00 -20 -16 -16.00 -10 -17 -16.10 -20 -16
-15.98 -16 -16.00 -20 -15 -15.90 -10 -16 -16.00 -20 -15
-15.95 -16 -16.00 -20 -15 -15.90 -10 -16 -16.00 -20 -15
-15.92 -16 -15.90 -20 -15 -15.90 -10 -16 -16.00 -20 -15
-15.89 -16 -15.90 -20 -15 -15.80 -10 -16 -15.90 -20 -15
-15.86 -16 -15.90 -20 -15 -15.80 -10 -16 -15.90 -20 -15
-15.83 -16 -15.80 -20 -15 -15.80 -10 -16 -15.90 -20 -15
-15.80 -16 -15.80 -20 -15 -15.80 -10 -16 -15.80 -20 -15
-15.77 -16 -15.80 -20 -15 -15.70 -10 -16 -15.80 -20 -15
-15.74 -16 -15.70 -20 -15 -15.70 -10 -16 -15.80 -20 -15
-15.71 -16 -15.70 -20 -15 -15.70 -10 -16 -15.80 -20 -15
-15.68 -16 -15.70 -20 -15 -15.60 -10 -16 -15.70 -20 -15
-15.65 -16 -15.70 -20 -15 -15.60 -10 -16 -15.70 -20 -15
-15.62 -16 -15.60 -20 -15 -15.60 -10 -16 -15.70 -20 -15
-15.59 -16 -15.60 -20 -15 -15.50 -10 -16 -15.60 -20 -15
-15.56 -16 -15.60 -20 -15 -15.50 -10 -16 -15.60 -20 -15
-15.53 -16 -15.50 -20 -15 -15.50 -10 -16 -15.60 -20 -15
-15.50 -16 -15.50 -20 -15 -15.50 -10 -16 -15.50 -20 -15
-15.47 -15 -15.50 -20 -15 -15.40 -10 -16 -15.50 -20 -15
-15.44 -15 -15.40 -20 -15 -15.40 -10 -16 -15.50 -20 -15
-15.41 -15 -15.40 -20 -15 -15.40 -10 -16 -15.50 -20 -15
-15.38 -15 -15.40 -20 -15 -15.30 -10 -16 -15.40 -20 -15
-15.35 -15 -15.40 -20 -15 -15.30 -10 -16 -15.40 -20 -15
-15.32 -15 -15.30 -20 -15 -15.30 -10 -16 -15.40 -20 -15
-15.29 -15 -15.30 -20 -15 -15.20 -10 -16 -15.30 -20 -15
-15.26 -15 -15.30 -20 -15 -15.20 -10 -16 -15.30 -20 -15
-15.23 -15 -15.20 -20 -15 -15.20 -10 -16 -15.30 -20 -15
-15.20 -15 -15.20 -20 -15 -15.20 -10 -16 -15.20 -20 -15
-15.17 -15 -15.20 -20 -15 -15.10 -10 -16 -15.20 -20 -15
-15.14 -15 -15.10 -20 -15 -15.10 -10 -16 -15.20 -20 -15
-15.11 -15 -15.10 -20 -15 -15.10 -10 -16 -15.20 -20 -15
-15.08 -15 -15.10 -20 -15 -15.00 -10 -16 -15.10 -20 -15
-15.05 -15 -15.10 -20 -15 -15.00 -10 -16 -15.10 -20 -15
-15.02 -15 -15.00 -20 -15 -15.00 -10 -16 -15.10 -20 -15
-14.99 -15 -15.00 -10 -14 -14.90 -10 -15 -15.00 -20 -14
-14.96 -15 -15.00 -10 -14 -14.90 -10 -15 -15.00 -20 -14
-14.93 -15 -14.90 -10 -14 -14.90 -10 -15 -15.00 -20 -14
-14.90 -15 -14.90 -10 -14 -14.90 -10 -15 -14.90 -20 -14

## Related functions

Other related functions are:

Last update: Apr 11, 2024     » Show contributors

Contributors: Alberto Ferrari, Marco Russo, Kenneth Barber,

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

# Deprecated

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

# Volatile

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

# 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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