# ROUNDDOWN Function (DAX)

Owen Duncan|Last Updated: 10/5/2018
|
1 Contributor

Rounds a number down, toward zero.

## Syntax

``````ROUNDDOWN(<number>, <num_digits>)
``````

#### Parameters

TermDefinition
numberA real number that you want rounded down.
num_digitsThe number of digits to which you want to round. Negative rounds to the left of the decimal point; zero to the nearest integer.

## Return Value

A decimal number.

## Remarks

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

If num_digits is 0, then the value in number is rounded down to the nearest integer.

If num_digits is less than 0, then the value in number is rounded down to the left of the decimal point.

ROUNDDOWN behaves like ROUND, except that it always rounds a number down. The INT function also rounds down, but with INT the result is always an integer, whereas with ROUNDDOWN you can control the precision of the result.

## Example

The following example rounds 3.14159 down to three decimal places. The expected result is 3.141.

``````=ROUNDDOWN(3.14159,3)
``````

## Example

The following example rounds the value of 31415.92654 down to 2 decimal places to the left of the decimal. The expected result is 31400.

``````=ROUNDDOWN(31415.92654, -2)
``````