FLOOR

Rounds number down, toward zero, to the nearest multiple of significance.

Syntax

FLOOR(number,significance)

Number is the numeric value you want to round.

Significance is the multiple to which you want to round.

Remarks

If either argument is nonnumeric, FLOOR returns the #VALUE! error value.
If number and significance have different signs, FLOOR returns the #NUM! error value.
Regardless of the sign of number, a value is rounded down when adjusted away from zero. If number is an exact multiple of significance, no rounding occurs.

Example

The example may be easier to understand if you copy it to a blank spreadsheet.

How?

Create a blank spreadsheet.
Select the example in the Help topic.

Selecting an example from Help
Press CTRL+C.
In the spreadsheet, select cell A1, and press CTRL+V.
To switch between viewing the formula that returns the result and the result in the cell, select the cell and press F2 and then ENTER, or click Commands and Options on the spreadsheet toolbar, click the Formula tab, and look in the Formula in active cell (active cell) box.

Formula	Description (Result)
=FLOOR(2.5, 1)	Rounds 2.5 down to nearest multiple of 1 (2)
=FLOOR(-2.5, -2)	Rounds -2.5 down to nearest multiple of -2 (-2)
=FLOOR(-2.5, 2)	Returns an error, because -2.5 and 2 have different signs (#NUM!)
=FLOOR(1.5, 0.1)	Rounds 1.5 down to the nearest multiple of 0.1 (1.5)
=FLOOR(0.234, 0.01)	Rounds 0.234 down to the nearest multiple of 0.01 (0.23)