The Excel DEC2OCT Function

Related Function:
Oct2Dec Function

Basic Description

Hexadecimal (base 16), decimal (base 10), octal (base 8), and binary (base 2) are the most commonly used numeral systems in engineering and computing. Therefore, Excel has provided functions to convert numeric values to and from each of these systems.

The Excel Dec2Oct function converts a decimal number into an Octal (Base 8) number.

The format of the function is :

DEC2OCT( number, places )

Where the number argument is the decimal number that is to be converted to octal, and the places argument is the number of characters that you want the returned octal number to have. If this is greater than the minimum, the octal number will be padded out using leading zeros.

If the places argument is omitted, then by default, the minimum number of places is used in the returned octal number.

  +   Display Octal Summary:

Dec2Oct Function Examples

The following spreadsheet shows examples of the Excel Dec2Oct function. The format of the function is shown in the spreadsheet on the left and the result is shown in the spreadsheet on the right.

1=DEC2OCT( 8 )
2=DEC2OCT( 18 )
3=DEC2OCT( 8, 10 )
4=DEC2OCT( -8 )
5=DEC2OCT( 237 )
110  Result is   1*8 + 0
222  Result is   2*8 + 2
30000000010  Result is   1*8 + 0
47777777770  Result is   -8^9 + 7*8^8 + 7*8^7 + ... + 7*8 + 0
5355  Result is   3*8^2 + 5*8 + 5

Note that, in the above example spreadsheet, the negative octal number in cell A4 is represented by two's complement notation.

Further information and examples of the Excel Dec2Oct function can be found on the Microsoft Office website.

Dec2Oct Function Common Errors

If you get an error from your Excel Dec2Oct function this is likely to be one of the following :

Common Errors
#VALUE!-Occurs if either the supplied number argument or the supplied places argument is not numeric.
#NUM!-Occurs if the supplied places argument ≤ 0.

Occurs when Analysis ToolPak add-in is not enabled in your Excel.
You will need to enable the add-in if you want to use the Excel engineering functions.

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