# How to use the FLOOR function in Excel In this article, we will learn about how to use the FLOOR function in Excel. The FLOOR function rounds down the number to the nearest specified multiple. FLOOR rounds to the nearest integer, using a 1 as significance. Positive numbers with decimal values are rounded down to the nearest integer (e.g. 6.7 is rounded down to 6) while negative numbers with decimal values are rounded away from zero (e.g. -5.8 is rounded to -6).

The FLOOR function rounds down a number to the nearest multiple.
Syntax:

=FLOOR (number, significance)

number : number to be rounded off

significance : multiple to use when rounding

Example:

All of these might be confusing to understand. So, let's test this formula via running it on the example shown below. Here we will perform the FLOOR function over different numbers and significance with the numbers.

Use the formula:

=FLOOR(C3,D3)

Explanation:
1. The nearest number in the multiple of 5 (significance) with respect to 56.45 (number).
2. The returned number must be less than the input number As you can see in the above snapshot that the function returns 55 which is the nearest integer in the multiple of 5. Now to apply the formula to the remaining cell just copy the formula using Ctrl + D taking the first cell till the last cell needed cell formula. As you can see, the function rounds down the number to a specified multiple.

Here are some observational notes shown below.

Notes:

1. The formula only works with numbers.
2. The formula returns the nearest last multiple given input any decimal number.
3. Negative significance is only allowed when number itself is negative else the formula returns #NUM! error.
4. Blank cell or 0 as significance value returns #DIV/0! error.
5. The function returns #VALUE! Error if the date or time value is invalid.

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