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Excel HEX2OCT Function

doc dec2oct 1

If you want to follow along with this tutorial, please download the example spreadsheet.

doc dec2oct 1


The Excel HEX2OCT function converts a hexadecimal number to an octal number.

Syntax and arguments

Formula syntax

HEX2OCT(number, [places])


  • Number: Required, the hexadecimal number that needed to be converted to an octal number. The number cannot contain more than 10 characters (40 bits). The first bit of the number indicates if the number is positive or negative, and the remaining bits indicate the magnitude of the number. Negative numbers are represented using two’s-complement notation.
  • Places: Optional, the number that specifies the number of characters of the result. If it is greater than the minimum, the octal number will be padded out using leading zeros, such as HEX2OCT("01",2) returns 01. If it is omitted, HEX2OCT uses the minimum number of characters necessary, such as HEX2OCT(1) returns 1. If the argument number is negative, the places value will be ignored, and returns a 10-character octal number. If argument places is a decimal number, it will be truncated to an integer.

Return Value

The HEX2OCT function returns to an octal number.


1. Return #NUM! error if one of below states occurs:

  • Argument number is > FFE0000000 or < 1FFFFFFFFF or an invalid value;
  • Argument places is provided not enough for the argument number, such as HEX2OCT(“1110”,2) returns #NUM!, because the correctly result is 10420.
  • Argument places is < = 0.

2. Return #VALUE! error if argument places is a non-numeric values.


Excel 2003 and later

Usage and Examples

Example: Basic Usage

There is a list of hexadecimal numbers placed in C4:C10, to get the corresponding octal numbers based on the places in D4:D10, please copy or enter the below formula to the next cell of the range:


Press Enter key and drag the autofill handle down to get all octal numbers.

doc dec2oct 1

If you just use the formula once, you also can directly type arguments in the formula:


Relative Functions:

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