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Let's say you want to round a number to the nearest whole number because decimal values are not significant to you or round a number to multiples of 10 to simplify an approximation of amounts. There are several ways to round a number.
What do you want to do?
Change the number of decimal places displayed, without changing the number
On a worksheet
 Select the cells that you want to format.
 To display more or fewer digits after the decimal point, click Increase Decimal or Decrease Decimal on the Formatting toolbar (toolbar: A bar with buttons and options that you use to carry out commands. To display a toolbar, press ALT and then SHIFT+F10.).
In a builtin number format
 On the Format menu, click Cells, and then click the Number tab.
 In the Category list, click Currency, Accounting, Percentage, or Scientific.
 In the Decimal places box, enter the number of decimal places that you want to display.
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Round a number up
To do this task, use the ROUNDUP, EVEN, or ODD functions.
Example
The example may be easier to understand if you copy it to a blank worksheet.
How to copy an example
 Create a blank workbook or worksheet.
 Select the example in the Help topic.
Note Do not select the row or column headers.
Selecting an example from Help
 Press CTRL+C.
 In the worksheet, select cell A1, and press CTRL+V.
 To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Tools menu, point to Formula Auditing, and then click Formula Auditing Mode.

A 
Data 
20.3 
5.9 
12.5493 
Formula 
Description (Result) 
=ROUNDUP(A2,0) 
Rounds 20.3 up to the nearest whole number (21) 
=ROUNDUP(A3,0) 
Rounds 5.9 up (6) 
=ROUNDUP(A4,2) 
Rounds 12.5493 up to the nearest hundredth, two decimal places (12.55) 
=EVEN(A2) 
Rounds 20.3 up to the nearest even number (22) 
=ODD(A2) 
Rounds 20.3 up to the nearest odd number (21) 

Function details
ROUNDUP
EVEN
ODD
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Round a number down
To do this task, use the ROUNDDOWN function.
Example
The example may be easier to understand if you copy it to a blank worksheet.
How to copy an example
 Create a blank workbook or worksheet.
 Select the example in the Help topic.
Note Do not select the row or column headers.
Selecting an example from Help
 Press CTRL+C.
 In the worksheet, select cell A1, and press CTRL+V.
 To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Tools menu, point to Formula Auditing, and then click Formula Auditing Mode.

A 
Data 
20.3 
5.9 
12.5493 
Formula 
Description (Result) 
=ROUNDDOWN(A2,0) 
Rounds 20.3 down to the nearest whole number ( 20) 
=ROUNDDOWN(A3,0) 
Rounds 5.9 down (5) 
=ROUNDDOWN(A4,2) 
Rounds the number down to the nearest hundredth, two decimal places ( 12.54) 

Functions details
ROUNDDOWN
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Round a number to the nearest number
To do this task, use the ROUND function.
Example
The example may be easier to understand if you copy it to a blank worksheet.
How to copy an example
 Create a blank workbook or worksheet.
 Select the example in the Help topic.
Note Do not select the row or column headers.
Selecting an example from Help
 Press CTRL+C.
 In the worksheet, select cell A1, and press CTRL+V.
 To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Tools menu, point to Formula Auditing, and then click Formula Auditing Mode.

A 
Data 
20.3 
5.9 
5.9 
Formula 
Description (Result) 
=ROUND(A2,0) 
Rounds 20.3 down, because the fractional part is less than .5 (20) 
=ROUND(A3,0) 
Rounds 5.9 up, because the fractional part is greater than .5 (6) 
=ROUND(A4,0) 
Rounds 5.9 down, because the fractional part is less than .5 (6) 

Function details
ROUND
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Round a number to a near fraction
To do this task, use the ROUND function.
Example
The example may be easier to understand if you copy it to a blank worksheet.
How to copy an example
 Create a blank workbook or worksheet.
 Select the example in the Help topic.
Note Do not select the row or column headers.
Selecting an example from Help
 Press CTRL+C.
 In the worksheet, select cell A1, and press CTRL+V.
 To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Tools menu, point to Formula Auditing, and then click Formula Auditing Mode.

A 
Data 
1.25 
30.452 
Formula 
Description (Result) 
=ROUND(A2,1) 
Rounds the number to the nearest tenth (one decimal place). Because the portion to be rounded is 0.05 or greater, the number is rounded up (result: 1.3) 
=ROUND(A3,2) 
Rounds the number to the nearest hundredth (two decimal places). Because the portion to be rounded, 0.002, is less than 0.005, the number is rounded down (result: 30.45) 

Functions details
ROUND
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Round a number to a significant digit above 0
To do this task, use the ROUND, ROUNDUP, ROUNDDOWN, LEN, and INT functions.
Example
The example may be easier to understand if you copy it to a blank worksheet.
How to copy an example
 Create a blank workbook or worksheet.
 Select the example in the Help topic.
Note Do not select the row or column headers.
Selecting an example from Help
 Press CTRL+C.
 In the worksheet, select cell A1, and press CTRL+V.
 To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Tools menu, point to Formula Auditing, and then click Formula Auditing Mode.

A 
Data 
5492820 
22230 
Formula 
Description (Result) 
=ROUND(A2,3LEN(INT(A2))) 
Rounds the top number to 3 significant digits (5490000) 
=ROUNDDOWN(A3,3LEN(INT(A3))) 
Rounds the bottom number down to 3 significant digits (22200) 
=ROUNDUP(A2,5LEN(INT(A2))) 
Rounds the top number up to 5 significant digits (5492900) 

Function details
ROUNDUP
ROUNDDOWN
ROUND
LEN, LENB
INT
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Round a number to a specified multiple
To do this task, use the MROUND function.
Example
The example may be easier to understand if you copy it to a blank worksheet.
How to copy an example
 Create a blank workbook or worksheet.
 Select the example in the Help topic.
Note Do not select the row or column headers.
Selecting an example from Help
 Press CTRL+C.
 In the worksheet, select cell A1, and press CTRL+V.
 To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Tools menu, point to Formula Auditing, and then click Formula Auditing Mode.

A 
B 
Formula 
Description (Result) 
=MROUND(16, 5) 
Rounds 16 to a nearest multiple of 5 (15) 
=MROUND(16, 5) 
Rounds 16 to a nearest multiple of 5 (15) 
=MROUND(2.6, 0.08) 
Rounds 2.6 to a nearest multiple of 0.08 (2.64) 
=MROUND(5, 2) 
Returns an error, because 5 and 2 have different signs (#NUM!) 

Function details
MROUND
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