By Cherry / Last Updated January 31, 2019

The Windows disk manager Diskpart is designed for disk management with command line. You can open the command prompt to manage your disks on Windows 7/8/10 with its syntax. This article will introduce you how to use command line to convert disk from GPT to MBR.

MBR disk and GPT disk

MBR, is the abbreviation of mater boot record. It uses the standard BIOS partition table. It only supports up to 4 primary partitions on the disk, if you want to create more partitions, you have to convert one of the primary partitions into extended partition, so that you can create more logical partitions. Besides, MBR disks only support up to 2TB per single partition in FAT32 file system, if you want to use a larger disk, MBR is not recommended.

GPT, is the abbreviation of GUID partition table disk. It uses the extensible firmware interface (EFI). It supports more than 4 partitions on a disk, and it can break the limitation of 2TB per single partition. Now, many users want to use GPT because of its unique features. However, sometimes, you need to convert GPT disk to MBR disk. For example, the Windows 95/98/ME, Windows NT4, Windows 2000, Windows 2003 32bit and Windows XP 32bit doesn’t support GPT partitions, the GPT disk will not be recognized until you convert it to MBR disk.

How to convert disk from GPT to MBR with Diskpart?

How to convert GPT disk to MBR disk with Diskpart? First, you need to open the Diskpart command line prompt. Click Start, type “cmd” in the search box, right click the program and select “Run as Administrator” to open the prompt, then type “diskpart” and press Enter to open the Diskpart program. Then, you can use the syntax to convert disk to MBR. Here takes an example of converting disk 1 to MBR disk.

Step1.Type “list volume” in the Diskpart command line prompt to check if there is any volume on the GPT disk. Then, it will list all the volumes.

Step2. Type “list disk” and press Enter. Here will list all the disks on your computer. Remember which one is the disk you need to convert.

Step3.Type “Select disk 1” and press Enter to select the disk.

Step4. After selecting the disk, type “convert mbr” and press Enter, it will convert the GPT disk into MBR disk.

Diskpart Convert MBR

It seems very easy to convert GPT disk to MBR disk. Actually, you can also convert MBR to GPT. But you need to know that you can only convert a disk from GPT to MBR only when the disk is empty and contains no volume. If there are any data or volumes on your disk, backup your data and delete partitions or volumes before converting it.

Convert GPT to MBR with AOMEI Partition Assistant

Convert MBR with Diskpart or Disk Management will meet the same problem that you must be the administrator or one of the Backup Operators. Here we recommend you a method to convert GPT disk to MBR disk with the freeware AOMEI Partition Assistant, which is suitable for users who do not know much about computer. Because AOMEI Partition Assistant supports convert disks between MBR and GPT without destroying any data, and it supports converting GPT disk more than four primary partition to MBR disk directly.

First, download AOMEI Partition Assistant Standard, install and launch it. Select the GPT disk and click Convert to MBR at the left control panel or right click the GPT disk, select Convert to MBR Disk at the menu.

Convert to MBR

Then, it will pop up a window to ask you if you are sure to convert disk from GPT to MBR disk. Click OK to move on.


Then, the disk has changed into MBR, but you need to click Apply on the toolbar to submit the pending operations.

MBR Apply

You need to know that convert GPT to MBR disk require reboot the system, so do not terrified if the computer is shutting down. To ensure the system bootable, you need to enter the BIOS.

The AOMEI Partition Assistant can help you convert disk between GPT and MBR more easier and Simpler, because it can help you finish the work even you are non-technician. If you need to convert system/boot disk between MBR and GPT, you can upgrade AOMEI Partition Assistnat to Professional version. But if you prefer to use the command line, the Diskpart could be a good helper.