How to create a hash for a string value in powershell

#MD5 output is 128bits=16bytes
#Output is always 22 characters long

$bytesFromInput = [System.Text.UTF8Encoding]::UTF8.GetBytes($InputString)
        $sha1= [System.Security.Cryptography.MD5]::Create()
        $bytesToOutput= $sha1.ComputeHash($bytesFromInput)
        [System.Convert]::ToBase64String($bytesToOutput).ToLower().Replace('+','0').Replace('/','0').Replace('=','')