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# ROUNDDOWN Function (DAX)

Rounds a number down, toward zero.

## Syntax

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

## Parameters

Term

Definition

number

A real number that you want rounded down.

num_digits

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 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.

### Related Functions

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)
```

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)
```