How to Convert Octal String to Decimal Number in PowerShell


Converting one type to another type is a common problem in scripting including converting octal number in form of string to decimal number.

In this blog post, we will walk through how to convert Octal String to Decimal number.


Using Convert class from .NET Framework

.NET Framework classes provide some methods for performing various types of data conversion tasks including converting string into octal number which is of integer type.

The most commonly used class is System.Convert which provides several static methods that are specifically designed for converting string into different data types such as int, double, etc.

To get list of static methods that can be used for conversion, we can use following command:

[Convert] | Get-Member -Static

Later, to convert octal number in form of string to decimal, we can use following script:

$string = "764"
$num = [Convert]::ToInt32($string, 8)

Write-Host $num

The output of above script is 500.


In conclusion, to convert octal string to decimal number we can use method provided by System.Convert class from .NET Framework.