http://bookofitadmin.blogspot.com/2015/11/how-to-convert-vmware-vmdk-disk-to.html

Step-1: Install Microsoft Virtual Machine Converter tool(http://www.microsoft.com/en-us/download/details.aspx?id=42497)

Step-2: Open PowerShell command prompt with Open as administrator mode.

Step-3: Run the following command to import necessary powershell commands

Import-Module ‘c:\Program Files\Microsoft Virtual Machine Converter\MvmcCmdlet.psd1’

Step-4:Run the following command to convert vmware vmdk to hyper-v vhd

ConvertTo-MvmcVirtualHardDisk -SourceLiteralPath ‘E:\vmware.vmdk’ -VhdType DynamicHardDisk -VhdFormat vhdx -destination c:\vm-vhd