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Excel CEILING Function
Excel Rounding Functions
The Excel Ceiling function is one of fifteen rounding functions in Excel.
A full list, along with comparison tables, is provided on the
Excel Rounding Functions page.
Basic Description
The Excel Ceiling function rounds a supplied number away from zero, to the nearest multiple of a given number.
The syntax of the function is:
CEILING( number, significance )
Where the arguments are as follows:
number    The number that is to be rounded. 
significance    The multiple of significance that the supplied number should be rounded to. (This should generally have the same arithmetic sign (positive or negitive) as the supplied number argument). 
Positive and Negative Arguments
Note: In Excel 2003 & 2007, the significance argument must have the same arithmetic sign (positive or negative) as the number argument. However, in later versions of Excel, the Ceiling function has been improved, so that it can now handle a negative number argument and a positive significance argument. In this case, the Ceiling function reverses the direction of the rounding (i.e. rounds the supplied number towards zero).Ceiling Function Examples
In column B of the following spreadsheet, the Excel Ceiling function is used to round the positive and negative numbers 22.25 and 22.25 to different significance values.
Formulas:  A  B 

1  number  ceiling 

2  22.25  =CEILING( A2, 0.1 ) 

3  22.25  =CEILING( A3, 0.5 ) 

4  22.25  =CEILING( A4, 1 ) 

5  22.25  =CEILING( A5, 10 ) 

6  22.25  =CEILING( A6, 20 ) 

7  22.25  =CEILING( A7, 0.1 ) 

8  22.25  =CEILING( A8, 1 ) 

9  22.25  =CEILING( A9, 5 ) 

 Results:  A  B 

1  number  ceiling 

2  22.25  22.3 

3  22.25  22.5 

4  22.25  23 

5  22.25  30 

6  22.25  40 

7  22.25  22.3 

8  22.25  23 

9  22.25  25 


The above examples show how, when the number and the significance arguments have the same arithmetic sign, the Ceiling function rounds away from zero.
Examples with Positive and Negative Arguments
Different combinations of positive and negative arguments, are shown in the spreadsheet below.
The results shown are those that would be obtained in current versions of Excel (Excel 2010 and later).
Formulas:  A  B 

1  number  ceiling 

2  22.25  =CEILING( A2, 1 ) 

3  22.25  =CEILING( A3, 1 ) 

4  22.25  =CEILING( A4, 1 ) 

5  22.25  =CEILING( A5, 1 ) 

 Results:  A  B  

1  number  ceiling  

2  22.25  23  

3  22.25  #NUM!  

4  22.25  22   returns an error in Excel 2007 & earlier 

5  22.25  23  


This example shows how:
 In Excel 2010 and later versions of Excel, a negative number argument and a positive significance argument reverses the direction of the rounding (i.e. rounds the negative number towards zero) (see cell B4).
 A positive number argument and a negative significance argument still results in an error in all versions of Excel (see cell B3).
For further information on the Excel Ceiling Function, see the Microsoft Office website.
Ceiling Function Error
If you get an error from the Excel Ceiling function, this is likely to be one of the following:
Common Errors
#NUM!    Occurs: 
In Excel 2010 or Excel 2013:    if the supplied number is positive and the supplied significance is negative.  In Excel 2007 or earlier:    if the supplied significance value has a different arithmetic sign to the supplied number argument. 

#DIV/0!    Occurs if the supplied significance argument = 0. 
#VALUE!    Occurs if any of the supplied arguments are nonnumeric. 