This article describes the formula syntax and usage of the FLOOR function (function: A prewritten formula that takes a value or values, performs an operation, and returns a value or values. Use functions to simplify and shorten formulas on a worksheet, especially those that perform lengthy or complex calculations.) in Microsoft Excel.
Description
Rounds number down, toward zero, to the nearest multiple of significance.
Syntax
FLOOR(number, significance)
The FLOOR function syntax has the following arguments (argument: A value that provides information to an action, an event, a method, a property, a function, or a procedure.):
 Number Required. The numeric value you want to round.
 Significance Required. The multiple to which you want to round.
Remarks
 If either argument is nonnumeric, FLOOR returns the #VALUE! error value.
 If number is positive and significance is negative, FLOOR returns the #NUM! error value.
 If the sign of number is positive, a value is rounded down and adjusted toward zero. If the sign of number is negative, a value is rounded down and 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 worksheet.
How do I copy an example?
 Select the example in this article. If you are copying the example in Excel Online, copy and paste one cell at a time.
Important: Do not select the row or column headers.
Selecting an example from Help
 Press CTRL+C.
 Create a blank workbook or worksheet.
 In the worksheet, select cell A1, and press CTRL+V. If you are working in Excel Online, repeat copying and pasting for each cell in the example.
Important: For the example to work properly, you must paste it into cell A1 of the worksheet.
 To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Formulas tab, in the Formula Auditing group, click the Show Formulas button.
After you copy the example to a blank worksheet, you can adapt it to suit your needs.

A 
B 
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) 
