This article describes the formula syntax and usage of the DEC2OCT 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
Converts a decimal number to octal.
Syntax
DEC2OCT(number, [places])
The DEC2OCT 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 decimal integer you want to convert. If number is negative, places is ignored and DEC2OCT returns a 10character (30bit) octal number in which the most significant bit is the sign bit. The remaining 29 bits are magnitude bits. Negative numbers are represented using two'scomplement notation.
 Places Optional. The number of characters to use. If places is omitted, DEC2OCT uses the minimum number of characters necessary. Places is useful for padding the return value with leading 0s (zeros).
Remarks
 If number < 536,870,912 or if number > 536,870,911, DEC2OCT returns the #NUM! error value.
 If number is nonnumeric, DEC2OCT returns the #VALUE! error value.
 If DEC2OCT requires more than places characters, it returns the #NUM! error value.
 If places is not an integer, it is truncated.
 If places is nonnumeric, DEC2OCT returns the #VALUE! error value.
 If places is negative, DEC2OCT returns the #NUM! error value.
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) 
=DEC2OCT(58, 3) 
Converts decimal 58 to octal (072) 
=DEC2OCT(100) 
Converts decimal to octal (7777777634) 
