The Excel HEX2OCT Function

Related Function:
Oct2Hex 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 Hex2Oct function converts a Hexadecimal (Base 16) number into an Octal (Base 8) number.

The format of the function is :

HEX2OCT( number, [places] )

Where the function arguments are :

number-The hexadecimal number that is to be converted to octal.

An optional argument, which specifies 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 omitted, the returned octal uses the minimum number of places.

Note that the number argument must be no more than 10 characters (40 bits) long. The most significant bit of this value denotes the sign of the number and the remaining 39 bits denote the magnitude. Negative numbers are represented using two's complement notation.

It should also be noted that, as hexadecimals use the numbers 0-9 and the characters a-f, they should be enclosed in quotation marks when they are supplied to an Excel function. (eg. The hexadecimal 11a should be input as "11a").

  +   Display Hexadecimal and Octal Summary:

Excel Hex2Oct Function Examples

The following spreadsheet shows examples of the Excel Hex2Oct 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=HEX2OCT( "A" )
2=HEX2OCT( "000000000F" )
3=HEX2OCT( "8", 10 )
5=HEX2OCT( "1F3" )

Note that, in the above example spreadsheet, the negative hexadecimal and octal numbers in cell A4 are represented by two's complement notation.

Further information and examples of the Excel Hex2Oct function can be found on the Microsoft Office website.

Hex2Oct Function Common Errors

If you get an error from your Excel Hex2Oct function this is likely to be one of the following :

Common Errors
#VALUE!-Occurs if the supplied [places] argument is not recognised as a number

Occurs if either:

  • the supplied number argument is not recognised as a hexadecimal number or contains more than 10 characters
  • the resulting octal number requires more places than is specified by the supplied [places] argument
  • 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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