Powerful Software to Convert MBR to GPT without Data Loss in Windows

February 1, 2019

As for converting MBR to GPT without data loss, this page brings you the best Software to realize such task. Besides, other traditional ways to convert MBR to GPT in windows will also be introduced in details.

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Nowadays, many Windows users search for a satisfactory answer to "how to convert MBR to GPT without data loss"in many technical blogs and forums. Why do they want to convert MBR to GPT? The difference between MBR and GPT offers the reasonable explanation.

  • The MBR hard disk can only support 2TB hard disk at most, but GPT can support 256TB.
  • The users can only create four primary partitions or three primary partitions and one extended partition on an MBR disk at most. The GPT can support 128 primary partitions at most.
  • Some booting main boards cannot support MBR as their system drive, such as MAC.

Therefore, is there any way to convert MBR to GPT with ensuring data security? Of course, YES! Next we will show you 3 different ways to complete this conversion. 

1.Use a professional disk conversion tool (Highly Recommended)

By far, the easiest way to convert MBR to GPT is to use a professional disk conversion tool like AOMEI Partition Assistant Professional Edition. It allows you to easily complete conversion between MBR and GPT in simple steps, while keeping all your data intact during the process.  It is compatible with almost all Windows operating systems like Windows 10/8/7. 

  • Steps to convert MBR to GPT without losing data

Note: you can back up disk which is about to be converted just in case something unexpected occurs during the conversion like power failure.

Step1. Install and launch the software, right click the MBR disk you want to change and then choose Convert to GPT Disk.

Convert Data Disk to GPT

Step2. In the pop-up windows, click OK to continue.

OK to GPT Data Disk

Step3. Click Apply to perform the operation and then your disk will be changed into GPT disk style.

Apply to GPT Data Disk

2. Use Diskpart to convert disk to GPT

As one of the Windows built-in tools, Diskpart is a common choice for users to convert disk, or format disk partition. However, this utility allows you to only convert an empty disk to GPT. So if there are some partitions/volumes on it, you need to delete partitions first, then you can continue the conversion. Hence, please backup your important data before applying this method.

The Diskpart Command can achieve the goal by the following steps.

Step 1. click "Start", and input "diskpart" in the search box.

Step 2. input "list disk" to list all disks connected to your computer.

Step 3. Input “select disk n”(n is the number of MBR disk)to select the MBR disk you want to convert to GPT.

Step 4. input "clean" to delete all partitions existing on the target disk.

Step 5. input "convert gpt".

3. Use Disk Management to Convert MBR to GPT

You can enter Disk Management by right click My Computer > Manage > Disk Management and use it to convert MBR to GPT. But same as Diskpart, it does not permit you to convert any MBR disk with partitions on. So you have to delete partitions first, otherwise you will find Convert to GPT Disk is grayed out. 

Final Words

From content above, it is easy to conclude that AOMEI Partition Assistant can convert MBR to GPT, or convert GPT to MBR without deleting partitions. So data loss can be avoided. But in Diskpart and Disk Management, removing partitions/volumes is a must step of converting MBR and GPT. So AOMEI Partition Assistant offers the best way to convert MBR to GPT without data loss.

Apart from converting data disk between MBR and GPT, this versatile disk conversion software could also convert boot disk between MBR and GPT styles. If you plan to convert the MBR system disk to GPT, please ensure the motherboard supports EFI/UEFI boot mode, otherwise the system cannot boot successfully after conversion.