How to Convert MBR to GPT in Windows /MacOS/Linux – Best 2 Methods

If you are still in the MBR world and looking to upgrade, we recommend you do a conversion to GPT. In this guide, we will go over what MBR and GPT are, which changes you should make, and step-by-step how to convert MBR to GPT safely.

Understanding MBR and GPT in Modern Computers

When setting up or installing a computer or in the process of an upgrade, what we see very often is that users have to choose between MBR (Master Boot Record) and GPT (GUID Partition Table), which are the two different options for disk partitioning. Today’s modern systems and Windows installers push for GPT, which does a better job with large-capacity drives and new tech.

Read More: How to fix Windows 10 Slow Boot

Why Convert MBR to GPT?

Before starting, we see that many users choose to do the conversion from MBR to GPT.

Supports large drivers

MBR is limited to drives of up to 2TB, whereas GPT does not have that limitation and therefore supports disks larger than 2TB.

More partitions

MBR sets a limit at 4 primary partitions, which is much lower than GPT, which supports up to 128 partitions.

Better performance

We see that GPT disk support is what newer systems with UEFI firmware use.

Improved Reliability

GPT stores many copies of partition data, which in turn makes it easy to recover in case of corruption. For better performance, scalability, also security, what you can do is convert MBR to GPT.

Read More: How to Clean Boot Windows 10

What to Verify Before Converting MBR to GPT

Converting between partition types is a delicate process, which is why we have put together these precautions for you to follow when you are converting from MBR to GPT.

• Save your data, as we have tools that do conversion without data loss. It is better to back up important files.
• Check if your system is UEFI compatible before you do the MBR to GPT conversion.
• Windows 10 and later versions, we have built-in tools that do this without losing the data.

How to convert MBR to GPT in Windows

In Windows, there are 2 primary ways to convert MBR to GPT.

Method 1: In Disk Manager (Clean Conversion)

This process will remove all partitions, so you should perform a backup.

• Right-click on the Start Menu and choose Disk Management.
• Find the one that you wish to convert.
• Delete all existing partitions.
• Right-click on the disk and go to Convert to GPT Disk.

This will immediately do the conversion from MBR to GPT, but erase all your existing data.

Method 2: Using the MBR2GPT tool (Without Data Loss)

Windows 10 and later versions include a feature that is a command-line tool named MBR2GPT that does the data-preserving disk conversion.

• Press Windows + X and choose Command Prompt (Admin).
• Type the following command:

mbr2gpt /validate /disk: 0 allowFullOS.

(Replace 0 with your disk number.)

• If validation is successful, type:

mbr2gpt /convert /disk: 0 /allowfullOS.

• Wait for the process to complete.

This tool provides you easy and quick way to convert MBR to GPT.

How to Convert MBR to GPT in macOS or Linux

If in a macOS or Linux environment, you can also do the conversion of MBR to GPT with disk utilities.

MacOS: Use Disk Utility in recovery Mode to erase and reformat the disk as GPT.

Linux: Use tools like gdisk or parted to change MBR partitions to GPT.

These issues mostly pertain to format, which is why it is important to back up your data before you switch from MBR to GPT.

Read More: How to Wipe a Mac to Factory Settings without CD

Tips to Ensure a Smooth Conversion

To prevent issues as you go along, here are some tips for converting MBR to GPT.

• Check that your PC supports UEFI boot.
• Back up your important files, even if you are using the safe MBR2GPT tool.
• Disconnect unnecessary external drives during conversion.
• After the conversion of MBR to GPT, check your BIOS/UEFI settings and put the boot mode into UEFI.

Common Issues While Converting

At times, we see that users have issues during the process of converting MBR to GPT. Here are some quick solutions.

• Validation Failed: Please check the disk for enough unallocated space.
• Conversion Error: Please run Command Prompt as Administrator.
• Boot issues: After conversion, try out UEFI mode.

Conclusion

Modern computers do best with GPT partitioning. We recommend that you convert MBR to GPT if you are still using the older format. You may use Disk Management, Command Prompt, or third-party tools for the process, which is, in fact, easy when done with care.

By the instructions put forth in this guide, you may convert MBR to GPT safely, which also includes full data recovery, and at the same time, you will be able to take full advantage of present-day storage solutions.