# FLOOR Function – Google Sheets

The FLOOR function in Google Sheets rounds a number down to the nearest integer multiple of a specified significance.

If the `value` is negative, and the `factor` is negative, this function rounds the `value` up towards zero.

## Syntax

`=FLOOR(value, factor)`

`value` – The number for the function to round

`factor` – The multiple to round down to

## Possible Errors

#NUM! – The value and the factor are different signs. Make both positive or negative.

#VALUE! – An argument is non-numeric.

## Examples

You can use FLOOR in many different ways. Let’s take a look at a few, starting with rounding currency.

### Example 1 – Round Down to the Next Nickel

Sometimes presenting a price rounded down to the next nickel looks better. Let’s look at how to do that.

The formula used in cell C2: `=FLOOR(A2,B2)`

We use the FLOOR function to round the Original Price to a factor of `\$0.05`. Since the function rounds down, it rounds `\$1.23` down to \$1.20 in row 2 and rounds `\$1.27` down to \$1.25 in row 4. Google Sheets does not round the value in row 3 because it is already a multiple of `\$0.05`.

### Example 2 – Round Up to the Nearest Half-Hour

Next, let’s round some time values. It is common to refer to a time as a rounded value. In this example, we’ll round values down to the next half-hour.

The formula used in cell C2: `=FLOOR(A2,B2)`

⚠️ You can enter a half hour as “`0:30`” or “`0:30:00`“. Either way, you’ll need to use custom formatting to remove the seconds, like in the example above in column B.

Rows 2 and 4 both get rounded down to the next half hour. As `1:30 PM` is already a multiple of 30 minutes, the FLOOR function does not change it.

### Example 3 – Round With Different Factors

Up to this point, we have been changing the `value`. Now let’s look at changing the `factor`. We’ll use positive and negative `factors` to see the differences.

You can see that negatives and positives move towards the same absolute values. Each output in column C is the opposite sign when the inputs flip their signs.