This PowerShell function will calculate how long it will take to transfer a given number of bytes at a given speed (in bits per second). Optionally, you can specify transfer overhead, which defaults to ten percent.

## Example Usage

PS C:\> Get-TransferTime -FileSize 4.4gb -Speed 2mb Days : 0 Hours : 5 Minutes : 0 Seconds : 22 TotalDays : 0.208587962962963 TotalHours : 5.00611111111111 TotalMinutes : 300.366666666667 TotalSeconds : 18022

## The Function

<# .Synopsis Data transfer time calculation. .DESCRIPTION Calculate how long it would take to transfer a given number of bytes at a given speed. .PARAMETER FileSize File Size in bytes. Can specify with GB, MB, etc. .PARAMETER Speed Transfer speed in bits. Can specify with GB, MB, etc. .PARAMETER OverheadPercent Transfer overhead percent. Defaults to 10. .EXAMPLE Get-TransferTime -FileSize 4.4gb -Speed 2mb .EXAMPLE Get-TransferTime -FileSize 50mb -Speed 10mb -OverheadPercent 6 .NOTES Ken Bradley, 2015-12-10 #> function Get-TransferTime { [CmdletBinding()] [Alias()] [OutputType([int])] Param ( [Parameter(Mandatory=$true, ValueFromPipelineByPropertyName=$true, Position=0)] [double]$FileSize, # bytes, can specify GB, MB, etc #Speed help! [Parameter(Mandatory=$true, ValueFromPipelineByPropertyName=$true, Position=1)] [double]$Speed, # bits, can specify GB, MB, etc [Parameter(Mandatory=$false, ValueFromPipelineByPropertyName=$true, Position=2)] [double]$OverheadPercent=10 ) # Scale percent so 100% = 1.0 $ScaledPercent = 1 + ($OverheadPercent / 100) # Calculate seconds $Result = ($FileSize * 8 * $ScaledPercent) / $Speed # Output the result nicely formated New-TimeSpan -Seconds $Result | Format-List -Property Days, Hours, Minutes, Seconds, TotalDays, TotalHours, TotalMinutes, TotalSeconds }

[EDIT: Previously, there was an error with OverheadPercent being excluded from the calculation. It has been added back. Thanks to JG for catching this.]

Where do you use the

OverheadPercentparam in your calculation??JG:

OverheadPercentwas left out. Thanks for noticing that. I’ve updated the post to include it.