This article describes the formula syntax and usage of the BIN2OCT 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 binary number to octal.
Syntax
BIN2OCT(number, [places])
The BIN2OCT 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 binary number you want to convert. Number cannot contain more than 10 characters (10 bits). The most significant bit of number is the sign bit. The remaining 9 bits are magnitude bits. Negative numbers are represented using two'scomplement notation.
 Places Optional. The number of characters to use. If places is omitted, BIN2OCT uses the minimum number of characters necessary. Places is useful for padding the return value with leading 0s (zeros).
Remarks
 If number is not a valid binary number, or if number contains more than 10 characters (10 bits), BIN2OCT returns the #NUM! error value.
 If number is negative, BIN2OCT ignores places and returns a 10character octal number.
 If BIN2OCT requires more than places characters, it returns the #NUM! error value.
 If places is not an integer, it is truncated.
 If places is nonnumeric, BIN2OCT returns the #VALUE! error value.
 If places is negative, BIN2OCT 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) 
=BIN2OCT(1001, 3) 
Converts binary 1001 to octal with 3 characters (011) 
=BIN2OCT(1100100) 
Converts binary 1100100 to octal (144) 
=BIN2OCT(1111111111) 
Converts binary 1111111111 to octal (7777777777) 
