How to “Convert MBR to GPT Without Data Loss”

In the realm of disk management, two types of partition tables are widely used: Master Boot Record (MBR) and GUID Partition Table (GPT). While MBR has been the standard for many years, GPT is becoming increasingly popular due to its more advanced features and compatibility with modern hardware.

If you’re considering switching from MBR to GPT, you’ll want to ensure that you don’t lose any data in the process.

This article will guide you on how to convert MBR to GPT without data loss, using Command Prompt and other free tools, covering Windows Server 2012 R2, Windows 7, Windows 10, and the new Windows 11.

Convert MBR to GPT Without Data Loss

Understand the Difference: MBR vs. GPT

MBR and GPT are partition structures used to organize how data is stored on your hard drive. MBR is older, supporting drives up to 2TB, and is limited to four primary partitions.

GPT, however, supports drives larger than 2TB and allows for virtually unlimited partitions. For these reasons, converting from MBR to GPT is often beneficial.

How to Convert MBR to GPT Without Data Loss

Before starting the conversion, it’s crucial to back up your data. While the methods described aim to prevent data loss, accidents can happen, and it’s always safer to have a backup.

Windows Built-In Tool: MBR2GPT.EXE

Starting with Windows 10 version 1703, Microsoft introduced a new command line tool called MBR2GPT.EXE, which allows you to convert an MBR disk to GPT without data loss. This tool is also applicable for Windows Server 2012 R2 and Windows 11.

To use the tool, follow these steps:

  1. Open Command Prompt as an administrator.
  2. Type mbr2gpt /validate /disk:0 to validate that the disk meets the requirements for conversion. Replace ‘0’ with the number of your disk if necessary.
  3. If validation is successful, type mbr2gpt /convert /disk:0 to start the conversion process.

Please note that you’ll need to restart your system and change the firmware to UEFI mode to complete the conversion.

Free Third-Party Tools

There are also numerous third-party tools available that allow for safe MBR to GPT conversion. One such tool is EaseUS Partition Master, a free disk management utility that enables users to safely convert their disks without data loss. To use EaseUS Partition Master, follow these steps:

  1. Download and install EaseUS Partition Master.
  2. Open the program and select the MBR disk you want to convert.
  3. Right-click the disk and choose ‘Convert to GPT’.
  4. Click ‘Apply’ to start the conversion process.

Converting MBR to GPT in Windows 7

Unfortunately, Windows 7 does not have a built-in utility like MBR2GPT. Therefore, using a third-party tool like EaseUS Partition Master or AOMEI Partition Assistant is recommended for Windows 7 users.


Converting MBR to GPT without data loss is a straightforward process, provided you follow the proper steps and take precautions.

Whether you’re using the built-in Windows tool, a free third-party application, or navigating the process on Windows 7, this guide should help you through the transition smoothly.

Remember, regardless of the method you choose, always back up your data before starting the conversion process.