Get-WmiObject Win32_LogicalDisk | Format-Table -autosize DeviceID,@{Label="Size(G)";Expression={[math]::round($_.Size/1GB,2)}},@{Label="Freespace(G)";Expression={[math]::round($_.FreeSpace/1GB,2)}},@{Label="Percent";Expression={"{0:P2}" -f ($_.Size/1GB - ($_.Size/1GB - $_.Freespace/1GB) / $_.Size/1GB)}}

 

All you need to look at is the last Expression statement.  For some reason, it's coming back as:

 

DeviceID Size(G) Freespace(G) Percent
-------- ------- ------------ -------
C:         93.16        54.73 9,315.82 %
D:        257.71       202.51 25,770.63 %

I understand Order of Operations is causing itn to show as 9,315% but anytime I try taking away paranthesis or adding some to ensure the first part of the calculation gets calcualted first, nothing ends up showing in Percent.

Any ideas?

There is no need to do the full percentage math when you are formatting with the "P" format pattern, the value is multiplied by 100 and displayed as a percentage:


# freespace percentage
"{0:P2}" -f ($_.freeSpace/$_.size)

It's odd because if I do the following, I get $null in Percent:
@{Label="Percent";Expression={"{0:P2}" -f ($_.FreeSpace / $_.Size)}}

If I do the following, I get 0.00% in Percent:
@{Label="Percent";Expression={"{0:P2}" -f ($_.FreeSpace/1GB / $_.Size/1GB)}}

Nevermind, got it working. Thanks Shay.

@{Label="Percent";Expression={"{0:P2}" -f (($_.FreeSpace/1GB) / ($_.Size/1GB))}}