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Excel DEC2OCT Function

doc dec2oct 1

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

doc dec2oct 1


The Excel DEC2OCT function converts a decimal number to an octal number.

Syntax and arguments

Formula syntax

DEC2OCT(number, [places])


  • Number: Required, the decimal integer number that you want to convert to an octal number. If the argument number is a decimal number (no whole number), it will be truncated to an integer.
  • Places: Optional, the number that specifies the number of characters of the result. If it is greater than the minimum, the result number will be padded out using leading zeros, such as DEC2OCT (1,5) returns 00001. If it is omitted, DEC2OCT used the minimum number of characters necessary. If the argument number is negative, the places value will be ignored by DEC2OCT function, and returns a 10-character (30 bits) octal number. The first bit indicates whether the number is positive or negative, and the remaining bits indicate the magnitude of the number. If argument places is a decimal number, it will be truncated to an integer.

Return Value

The DEC2OCT function returns an octal number.


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

  • Argument number is > -536,870,912,888 or < 536,870,911;
  • Argument places is provided not enough for the argument number, such as DEC2OCT(100,1) returns #NUM!, because the real result is 64;
  • Argument places is < = 0.

2. Return #VALUE! error if any arguments of DEC2OCT function are non-numeric values.


Excel 2003 and later

Usage and Examples

Example: Basic Usage

Decimal numbers and places are listed in range B5:B11, to get the corresponding octal numbers based on the places in cell C5:C11, 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:

  • Excel STDEVP Function
    The Excel STDEVP function returns standard deviation based on the entire population.

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