Format time difference between 2 date time vars in a Powershell script

Question

I'm using Powershell to run an AWS backup to S3 buckets and write out a continuing log file. I need to show how long the backup takes in the log file. I've tried a number of methods and can't seem to find one that works. If I remove the -Format... command it shows the time difference but it's ugly. This code is one of my many attempts

$StartTime = get-date
>>> RUN THE BACKUP
$EndTime1 = Get-Date
$DURATION = $EndTime1 - $StartTime  -Format 'hh:mm:ss'

Answer 1

Either use ToString() directly on the resulting TimeSpan , or use the -f string format operator:

$duration.ToString('hh\:mm\:ss')
# or 
'{0:hh\:mm\:ss}' -f $duration