Use Software to Convert MBR to GPT or vice versa

Best Way to Convert MBR to GPT or GPT to MBR without Data Loss in Windows:

  • Install and run the disk converter, right-click the MBR disk and choose "Convert to GPT" or "Convert to MBR".
  • Click the "Execute 1 Operation".
  • Click the "Apply" button.
  • Learn more details>>

This is a how-to tutorial to learn about how to convert MBR to GPT without data loss. Reading for 3-4 minutes, you can get a best way and other 3 solutions.

Want to Convert MBR to GPT or GPT to MBR without Data Loss?

Target of Converting MBR to GPT- Break the 2TB File System Limit of MBR in Windows 11/10/8.1/8/7

Target of Converting GPT to MBR - Utilize your disk compatible with a suitable boot mode.

No matter whether you know MBR and GPT, you must have encountered such a situation. Your disk has 4TB of space, but you can only use 2TB of space, and the remaining 2TB seems to be wasted. Why does a 4TB hard drive only show 2TB? This is because your disk is MBR.

MBR only supports up to 2TB volume size and 4GB file size. Unlike MBR disk, GPT disk doesn't have such limitations. You can know their difference in this table.

Comparison MBR GPT
Maximum Partition Size 2TB 9.4ZB (1ZB=1billion TB)
Maximum Partition Number 4 primary partitions or three primary partitions and one extended partition 128 primary partitions
Firmware Interface Support BIOS UEFI

Therefore, if you want to break those limits on an MBR disk or fit with right boot mode, you'd better convert MBR to GPT or vice versa.

Best Way to Convert MBR to GPT or GPT to MBR Without Data Loss

The disk conversion tool - EaseUS Partition Master perfectly meets your demands of changing MBR to GPT without data loss. Whether you want to convert MBR to GPT or convert GPT to MBR, you can apply this software to get it done without deleting the volumes on your disk.

- EaseUS Partition Master -

Your Smart Windows 11 Update Disk Manager

  • MBR to GPT Converter, Make Disk Ready for Windows 11.
  • Migrate Windows 11 to New SSD in 1-Click.
  • Handy to Extend or Combine Partitions in Windows 11.
  • Clone and Upgrade Disks without Data Loss.
Free DownloadWindows 11/10/8/7

Whether you're a computer novice or an expert, you can easily apply this tool to simply change partition style in Windows 11/10/8/7 now.

How to Change MBR to GPT Without Losing Any Data

Step 1. Download and launch EaseUS Partition Master on your computer.

Step 2. Go to Disk Converter, select "Convert MBR to GPT" and click "Next" to continue.

convert MBR to GPT - 1

Step 3. Select the target MBR disk that you tend to convert to GPT, and click "Convert" to start the conversion.

convert MBR to GPT - 2

Important: There is one thing you need to pay attention to. If the disk you want to convert is the system disk, make sure the motherboard of the computer supports the boot mode of the target partition style. Remember that MBR supports BIOS and GPT supports UEFI.

How to Convert GPT to MBR without Data Loss

  • Click "Disk Converter" on the left menu. Select "Convert GPT to MBR" and click "Next" to continue.
  • Select the GPT disk that you want to convert and click "Convert".
  • Wait for the process completes.

Related Articles:

Other 3 Ways to Convert MBR to GPT or GPT to MBR Without Data Loss

You can learn other three ways to convert MBR to GPT or GPT to MBR in this article. Note that these three solutions will cause data loss if you forgot to back up partitions. Looking for the data protection solution? Go back to use EaseUS Partition Master.

Tip 1. Convert MBR to GPT Using DiskPart Tool

You can convert MBR to GPT in CMD with the Diskpart tool. But you need to know that Diskpart will delete all files and folders from your hard drive when changing disk to GPT.

So we strongly recommend you back up your files in advance and then perform data restoring after the conversion. If there are lots of files on your disk, you are recommended to back up your data effectively using the free backup software - EaseUS Todo Backup. 

After backing up the files, follow the steps below to use Diskpart in CMD to convert MBR to GPT.

Step 1. Type CMD in the Search box. Right-click Command Prompt and choose "Run as administrator". If CMD isn't available, you can use PowerShell instead.

Step 2. Open Command Prompt, type DiskPart, and press Enter.

Step 3. Type list disk and press Enter. (Note down the number of the disk you which you want to convert to GPT)

Step 4. Type select disk X. (Replace the X with the correct number of your hard drive)

Step 5. Now type clean and press Enter. This command will remove all the files and partitions from your hard drive, so back up all important files in advance.

Step 6. Type convert gpt and press Enter.

This method is not suitable for computer beginners. If you mistakenly cleaned a partition using DiskPart, you can undo DiskPart clean to retrieve your files.

To Convert GPT to MBR Using Command Prompt:

  • list disk
  • select disk *
  • clean
  • convert mbr
  • exit

convert gpt to mbr using cmd

related articles

How to Install Windows 10 on GPT Partition?

Can't install Windows 11/10 on GPT partition? This page shows you how to install Windows 11/10 on the GPT partition successfully in the easiest way.

How to Install Windows 10 on GPT Partition

Tip 2. Convert MBR to GPT Disk with Disk Management

Similar to using CMD, you also need to delete all partitions on your disk using Disk Management. Before you convert the disk from MBR to GPT or from GPT to MBR, you should back up your disk. If you want to recover a deleted partition, you can use a partition recovery software tool to get your lost data and partition back.

To Convert MBR to GPT:

Step 1. Right-click on "This PC", choose "Manage", then head to "Disk Management".

Step 2. Right-click the volumes on your target disk and choose "Delete Volume..."

Step 3. When your disk becomes empty (shows as unallocated space), right-click your disk and choose "Convert to GPT Disk".

Convert MBR to GPT in Disk Management

To Convert GPT to MBR in Disk Management:

  • Right-click on a volume and select Delete Volume. Delete all volumes.
  • Right-click on the disk and select Convert to MBR Disk.

convert gpt to mbr using disk management

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Tip 3. Convert MBR to GPT Without Losing Data with MBR2GPT 

MBR2GPT.exe is a Windows built-in tool used to convert the disk from MBR to GPT. The advantage of this tool is that it won't destroy the files on your disk during the conversion.

But that's not recommended since it's complicated to use and you may encounter various problems according to the feedback from other users. Besides, it's only available in Windows 10 version 1730 and later.

Run MBR2GPT in WinPE to Convert MBR to GPT CMD

Step 1. Click the Start button > click the Power button > hold the Shift Key and click Restart to access the Advanced Startup screen.

Step 2. Navigate to "Troubleshoot > Advanced options > Command Prompt".

Step 3. In Command Prompt, input these commands orderly, and press Enter after each command line.

  • mbr2gpt /validate
  • mbr2gpt /convert

convert mbr to gpt without data loss using mbr2gpt

After running these commands, your disk will be converted from MBR to GPT without data loss.

Run MBR2GPT in Full Windows OS to Convert MBR to GPT

MBR2GP tool is designed to be run in a Windows Preinstallation Environment (Windows PE) environment command prompt, but can also be run from the full Windows 10 operating system (OS) by using the /allowFullOS option.

Step 1. Run Command Prompt (Admin) on your Windows 10.

Step 2. Type command lines below and press enter after each one.

  • mbr2gpt /validate /allowFullOS
  • mbr2gpt /convert /allowFullOS

You can check the details of MBR2GPT.EXE in the related Microsoft documents.

How to Enable UEFI Mode After Converting System Boot Disk to GPT

If you have converted a system disk (MBR) to GPT, you need to enable the UEFI boot mode on your computer to make the OS bootable. Here are the steps:

Step 1. Restart PC and press F2, F8, F12, Del to enter the BIOS boot menu.

Step 2. Locate the "Boot" options menu and enable the UEFI mode.

  • Set Launch CSM to Enabled.
  • Set Boot Device Control to UEFI Only
  • Set Boot from Storage Devices to UEFI driver first

Step 3. Set the UEFI OS Boot option at the top of the Boot Priority List.

Step 4. Save the changes and exit BIOS, reboot PC from the GPT disk

how to boot from GPT disk after conversion

After this, wait patiently. Your computer will automatically boot from the GPT disk

The Bottom Line

After reading this guide, you will find that using EaseUS Partition Master is the easiest way to convert MBR to GPT without data loss among the four solutions. With this tool, you can convert MBR to GPT or convert GPT to MBR directly without deleting any partition.

If you prefer using Disk Management or DiskPart to convert MBR to GPT, remember to back up your disk in advance. While if you attempt to use MBR2GPT.exe, make sure your disk meets the requirements given by Microsoft, or the conversion will not proceed and an error will occur.

Free Download 

Windows 11/10/8/7100% Secure

Convert MBR to GPT CMD FAQs

1. How do I change from MBR to GPT free?

  • Download, install and open EaseUS Partition Master Free for all users.
  • Click "Disk Converter" and select "Convert MBR to GPT".
  • Follow the instruction.

2. Can I convert MBR to GPT without formatting?

Yes, the way to convert MBR to GPT without formatting is running a third-party MBR to GPT convert - EaseUS Partition Master.

3. How do I create a GPT partition in CMD?

Open Command Prompt and type the following commands:


list disk

select disk X


convert gpt

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Updated by Sherly

Sherly joined EaseUS in 2022 and she has always loved writing articles and enjoys the fun they bring. She receives professional training here, focusing on product performance and other relative knowledge. She has written over 200 articles to help people overcome computing issues.

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Written by Tracy King

Tracy became a member of the EaseUS content team in 2013. Being a technical writer for over 10 years, she is enthusiastic about sharing tips to assist readers in resolving complex issues in disk management, file transfer, PC & Mac performance optimization, etc., like an expert.

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